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Home » Best Protein Powder » The 7 Best Casein Protein Powders of 2025, According to an RD

The 7 Best Casein Protein Powders of 2025, According to an RD

From the tastiest to the easiest to digest, these are the best casein proteins we could find on the market.

Written by Amanda Capritto, CPT, CSNC, CPS
Updated by Ben Emminger, NASM-CNC, NASM-CSNC on February 14th, 2025
Expert VerifiedMedically Reviewed By: Dr. Jennie Stanford, M.D., FAAFP, DipABOM
Expert VerifiedExpert Contributor: Chelsea Rae Bourgeois, MS, RDN, LD
Expert VerifiedFact Checked By: Kate Meier, NASM-CPT, USAW-L1, CF-L1
Expert VerifiedReviewed By: Michael Shafer, M.S., CSCS, USAW-L1, ACSM-EIM

We receive free products and receive commissions through our links. See disclosures page.
  • Top Casein Proteins
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  • How We Tested
  • |
  • Benefits
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  • What to Consider
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  • FAQs

There are two types of protein in milk: whey and casein. Both can aid in muscle growth and recovery after a workout, but many prefer casein protein powder because it digests slower and is typically more filling than whey. Its slow-digesting nature is why it’s been deemed the best pre-sleep protein option: It feeds your muscles an extended-release dose of amino acids while you snooze. (1)(2)

Given the popularity of protein powders and the potential advantages of casein, how do you decide which is the best product on the market? Our team of BarBend experts tested more than 100 of the best protein powders to gather first-hand experience—and had registered dietitians analyze the formulas for popular products—to build a list of the best casein protein powders. Whether you’re after the best-tasting casein, the best all-natural casein, or simply the best budget casein, we have a pick for you.

The 7 Best Casein Protein Powders of 2025

  • Best Casein Protein: Transparent Labs Casein
  • Best Tasting Casein Protein: Legion Casein+
  • Best Casein Protein for Digestion: Naked Nutrition Casein
  • Best Natural Casein Protein: Muscle Feast Grass Fed Micellar Casein
  • Best Budget Casein Protein: Optimum Nutrition Gold Standard Casein
  • Best Casein Protein for Baking and Pudding: Dymatize Elite Casein
  • Best Casein Protein for Athletes: Ascent Native Fuel Micellar Casein

Medical disclaimer: The content on BarBend is meant to be informative in nature, but it should not be taken as medical advice. The opinions and articles on this site are not intended to diagnose, prevent, and/or treat health problems. It’s always a good idea to talk to your doctor before beginning a new fitness, nutritional, and/or supplement routine. Individual needs for vitamins and minerals will vary.

Experts Who Contributed

  • Dr. Jennie Stanford, M.D., FAAFP, DipABOM
  • Amanda Capritto, CPT, CES, CNC, CF-L1, CSNC
  • Michael Shafer, M.S., CSCS, USAW-L1, ACSM-EIM 
  • Chelsea Rae Bourgeois, M.S., R.D.N., L.D
  • Kate Meier, NASM-CPT, USAW-L1, CF-L1

Best Casein Protein Overall: Transparent Labs Casein Protein

Transparent Labs Grass-Fed Casein
Transparent Labs Grass-Fed Casein
Transparent Labs Grass-Fed Casein

Free of artificial flavors, colors, and sweeteners, Transparent Labs Grass-Fed Casein is an incredibly straightforward supplement without fillers. It's also remarkably low in fat and carbohydrates.

Shop Transparent Labs

Specs

  • Protein: 25g
  • Flavors: Chocolate
  • Sweeteners Used: Stevia extract
  • Third-Party Testing: Informed Choice Certified and Informed Protein Certified
  • Price per Serving: $1.99
Pros
25 grams of casein protein per serving
Sourced from 100% grass-fed cows
Informed-choice certified
Cons
One flavor option
Pricey per serving
Can be a little messy

Why We Like It

Transparent Labs’ casein protein is a good all-around pick for athletes looking to invest in this supplement. One serving contains 120 calories, including 4 grams of carbs, 0.5 gram of fat, and 25 grams of protein, earning an overall 4.5 out of 5 for the formulation from our testers. This protein also uses grass-fed dairy and has zero artificial sugars and additives (it’s sweetened with stevia instead).

Our team loved the flavor, too. “I tried the chocolate and it tastes just like the chocolate pudding in the little plastic tubs you eat as a kid,” our tester said, giving the flavor a rating of 5 out of 5. “It’s so delicious, I actually find myself craving the taste for dessert.” We do wish there were more than one flavor option, though, as chocolate may not be every athlete’s favorite.

One scoop of Transparent Labs Casein Protein.
Transparent Labs Casein Protein poured from Blender bottle into a glass.
Transparent Labs Casein Protein nutrition label
A woman taste tests Transparent Labs Casein Protein.
Transparent Labs Casein Protein in a glass
One scoop of Transparent Labs Casein Protein.
Transparent Labs Casein Protein poured from Blender bottle into a glass.
Transparent Labs Casein Protein nutrition label
A woman taste tests Transparent Labs Casein Protein.
Transparent Labs Casein Protein in a glass

After trying this product, we didn’t notice any negative side effects, so our testers gave this category a 5-out-of-5 score, too. Plus, we like that this formula is third-party tested and Informed Choice Certified. This helps guarantee that the ingredients on the label are reflective of the actual product. 

Our expert Chelsea Rae Bourgeois, M.S., R.D.N., L.D had one caution: “This protein powder contains 300 milligrams of sodium per scoop, which is a significant amount of your day’s recommended total.”

BarBend's protein scorecard for Transparent Labs Casein Protein.
BarBend worked with an accredited lab to gather testing data on the overall purity of Transparent Labs Casein protein powder.

The consistency is great, evidenced by our tester’s 5-out-of-5 score for solubility. “This product can mix up into a nice, thick shake or a pudding-like consistency,” our tester said. “I don’t think this one clumps or settles much at all.” One minor thing to note: This powder is much softer than others, our tester explained. It puffs up in the air when you scoop, so it can be a little messy. Just scoop carefully.

While we love the high-quality formula, it isn’t the most budget-friendly on the market, earning a score of 2.25 out of 5 in the cost category. One 30-serving container costs $59.99, which is about $1.99 per serving. You can definitely find more budget-friendly options, and this price point may not be accessible for everyone. TL does offer a subscribe-and-save option, though, which can save you $6 plus shipping costs.

Read More

Read our full Transparent Labs Casein Protein Review.

Best Tasting Casein Protein: Legion Casein+

Legion Casein+
Legion Casein+
Legion Casein+

Legion's Casein+ has more protein per calorie than any other casein we've seen, plus it has no artificial ingredients. Each serving provides 5.2 grams of branch chain amino acids.

Shop Legion

Specs

  • Protein: 25g
  • Flavors: Dutch Chocolate, Cinnamon Cereal, French Vanilla, Strawberry 
  • Sweeteners Used: Stevia extract
  • Third-Party Testing: Lab Tested for Purity
  • Price per Serving: $2
Pros
Four delicious flavor options
95% grass-fed and Animal Welfare Approved
No artificial flavors or sweeteners
Cons
Not budget-friendly
Contains soy
Does separate

Why We Like It

Legion’s casein comes in four tasty flavors, and after trying the product ourselves, our team loved the taste of the Dutch Chocolate option. “I tried the Dutch Chocolate flavor and I liked it,” our tester said, giving the flavor a 5 out of 5. “The taste is a lot like dark chocolate, which isn’t too rich or too sugary.”

We’re fans of Legion’s formula, too. One serving offers up 25 grams of protein with only 3 grams of carbs and half a gram of fat. We also like that the brand uses grass-fed dairy and zero refined sugars or unnecessary additives, choosing instead to sweeten this protein powder with stevia leaf extract. Its macro profile, and the fact that it’s free from artificial ingredients, earned it 4.5 out of 5 points for the formula category. (17)

legion casein scoop
legion casein scoop

Our team loves that this product is third-party tested for purity and potency, which earned it a score of 5 out of 5 points in that category. Plus, you can even see the brand’s lab results for the latest tested batch of protein right on the product page, which is great for transparency. 

The BarBend team worked with a third-party accredited lab, testing and comparing Legion Casein+ against more than 150 protein powders. It scored in the top 50 percent or better in categories like label accuracy, pesticides, phthalates, bisphenols, and heavy metals, landing it near the top of our list of casein proteins. 

BarBend worked with an accredited lab to gather testing data on acurracy and purity in Legion’s Casein protein.

After mixing this product with water, we liked the solubility, giving this category 4.5 out of 5 points. “This mixed really well and had a normal thickness,” one tester explained. “When I left it alone too long, the product did separate but this was after 20 minutes.” We also wanted to note that the aftertaste is pretty chalky, which some people may not love. 

Neither of our testers noticed any side effects, which is a plus. “I’d give my overall experience with this casein a 4 out of 5,” one tester said. “I definitely plan to use this product more in the future.”

The pricing isn’t the best, though: At $59.99 for 30 servings, this definitely isn’t the cheapest product on the market. Casein+ earned 3 out of 5 points in this category, because you can definitely find casein proteins that are less expensive than $2 per serving—but they won’t all be as high-quality.  

Read More

Best Casein Protein for Digestion: Naked Nutrition Casein

Naked Nutrition Micellar Casein Protein Powder
Naked Nutrition Micellar Casein Protein Powder
Naked Nutrition Micellar Casein Protein Powder

Naked Nutrition's Micellar Casein Protein Powder has no artificial flavors, sweeteners, or colors and 26 grams of protein per serving. We also like that this formula has zero additives.

Shop Naked Nutrition

Specs

  • Protein: 26g
  • Flavors: Unflavored, Chocolate, Vanilla
  • Sweeteners Used: Organic coconut sugar
  • Third-Party Testing: Yes
  • Price per Serving: $1.05
Pros
Slow-digesting for sensitive stomachs
No additives or artificial sweeteners
Contains 48% daily calcium
Cons
Only comes in five-pound tub
Contains coconut sugar
Not third-party tested

Why We Like It

Naked Nutrition’s unflavored casein protein powder consists of 100 percent slow-digesting micellar casein—there are no other ingredients. Even the flavored versions (chocolate and vanilla) feature minimal ingredients lists, with just cocoa powder or natural vanilla flavor, respectively, plus a bit of organic coconut sugar. 

The lack of unnecessary ingredients should make this casein protein powder easier on the stomach, which earns it its title of the best casein protein for digestion, according to our hands-on testing. 

This casein has an ultra-lean macronutrient profile, including 26 grams of protein and zero grams of carbs or fat per serving. Our team likes that the brand doesn’t use any artificial sugars or additives, nor any artificial flavors, dyes, or texture agents. (17) Combined, these factors earned Naked Casein a perfect 5-out-of-5 score for formula. 

Our tester reading the Naked Micellar Casein ingredients list.
Our tester getting a scoop of Naked Micellar Casein
Our tester reading the Naked Micellar Casein ingredients list.
Our tester getting a scoop of Naked Micellar Casein

“The unflavored option is pretty true to the description,” our tester said, giving the flavor a 4 out of 5. “I’ve mixed it with coffee or chocolate syrup and that definitely makes it more appetizing. I also baked it with other ingredients and it tasted great.”

In our experience, the product dissolved okay, but we did find it a little difficult to shake up. Compared to the other casein proteins we tried, this product earned 4 out of 5 points for solubility. It didn’t clump too much but we’ve definitely tried options that dissolved more smoothly. This is due to the lack of a lecithin, a common emulsifier found in most casein protein powders. 

Naked Nutrition’s casein actually has a pretty budget-friendly price point. The container costs $79.99 for 76 servings, which is about $1.05 per serving. We do have to point out that one container is five pounds, though, which may be a little too much product for people with limited cabinet space.

Read More

Best Natural Casein Protein: Muscle Feast Grass-Fed Micellar Casein

Muscle Feast Grass-Fed Micellar Casein
Muscle Feast Grass-Fed Micellar Casein
Muscle Feast Grass-Fed Micellar Casein

This inexpensive casein is all-natural and sourced from grass-fed cows. It is available either flavored or unflavored in a two or four-pound tub.

Shop Amazon

Specs

  • Protein: 19g
  • Flavors: Unflavored, Chocolate
  • Sweeteners Used: Stevia
  • Third-Party Testing: N/A
  • Price per Serving: $1.28
Pros
All natural ingredients
Budget-friendly
Available in bulk
Cons
Only two flavors
Only 19 grams of protein per serving
Not third-party tested

Why We Like It

For athletes who want a natural casein protein, we recommend this product from Muscle Feast. Muscle Feast’s casein is grass-fed and uses only natural ingredients with no artificial additives. With just 0.5 grams of fat and 1.2 grams of carbs per serving, the macro balance is ideal for a protein powder, though this powder only serves up 19 grams of protein per scoop.

Though lower in protein than competitors, that’s still a respectable amount, and the low calorie content (88 per serving) makes it a suitable option for individuals looking to lose weight but still maintain protein intake. All in all, our team awarded the formula 4.5 out of 5 points for its simple, straightforward ingredients list and great macro ratio. 

Our team tried the Chocolate option, giving it a score of 3 out of 5 points. “The taste wasn’t particularly strong,” our tester said. “I almost thought I’d accidentally purchased the Unflavored option. It’s not bad, just not a very strong, noticeable flavor.” 

The solubility was solid, though. Our tester used this powder to make a protein pudding and gave the consistency a score of 5 out of 5. In their experience, it was pretty comparable to other protein puddings they’ve tried. 

Unfortunately, this product isn’t third-party tested, which we would have liked to see. We had to give this category a score 2 out of 5 points, since there doesn’t appear to be any sort of independent verification of potency or purity. 

This protein isn’t the most expensive but it’s not the cheapest either, earning a 4 out of 5 in the cost category. One 37-serving bag costs $52.99, which is about $1.28 per serving. For the most part, we think this is a pretty budget-friendly pick.

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Best Budget Casein Protein: Optimum Nutrition Gold Standard Casein

Optimum Nutrition Gold Standard Casein
Optimum Nutrition Gold Standard Casein
Optimum Nutrition Gold Standard Casein

Well-rounded, well-priced casein that contains enzymes that might improve its digestion. Each single-scoop serving packs 24 grams of protein and just a single gram of sugar.

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Specs

  • Protein: 24g
  • Flavors: Chocolate Peanut Butter, Chocolate Supreme, Cookies & Cream, Vanilla
  • Sweeteners Used: Sucralose
  • Third-Party Testing: N/A
  • Price per Serving: $1.52
Pros
Budget-friendly price per serving
More flavor options than others
53 servings per container
Cons
Contains artificial sweeteners
Contains soy
Not third-party tested

Why We Like It

Building a supplement stack can get pricey, quick. Luckily, there are a number of budget-friendly supplement options out there, including casein protein. Optimum Nutrition’s Gold Standard Casein is the epitome of a good value: For about a buck-fifty per serving, you get 24 grams of slow-digesting micellar casein protein.

Overall, our team really liked this formula. One serving is only 120 calories, including 1 gram of fat, 4 grams of carbs, and 24 grams of protein. We don’t love that Optimum Nutrition uses sucralose, as this artificial sweetener may not sit well with all athletes. (13) Registered dietitian Chelsea Rae Bourgeois says she loves that this casein protein provides 100 percent of the daily recommended value for zinc. (14)

“Zinc is essential to make proteins in the body, so it plays a role in many biological functions,” she says. “I also like that the protein powder is pretty lean, letting you prioritize protein intake without excessive carbs and fat. It gives you the chance to get those macros from whole foods.” 

All things considered, Bourgeois awarded the formula for this micellar casein protein powder 4.25 out of 5 points, with high marks for its lean macro ratio and high zinc content.

Optimum Nutrition Casein with scoop
Optimum Nutrition Casein on weights
Optimum Nutrition Casein pudding with spoon
Optimum Nutrition Casein with scoop
Optimum Nutrition Casein on weights
Optimum Nutrition Casein pudding with spoon

Much to the dismay of our team of personal trainers and nutrition coaches, Optimum Nutrition casein doesn’t appear to be third-party tested like the brand’s whey is, so it earned a paltry 1 out of 5 points in that category. 

It scored much higher in the taste and texture departments: “I tried both the Chocolate Peanut Butter and Chocolate Supreme and I thought both flavors were smooth and appetizing,” our tester said, giving the flavor a 5 out of 5. “The chocolate flavor is almost as good as chocolate pudding.”

For solubility, Optimum Nutrition’s casein protein supplement earned a 4.5 out of 5. Our tester used this as a protein pudding but didn’t have luck sipping this as a shake. The consistency was really thick and the more liquid they added, the thicker the protein got. So, if you want a protein powder you can sip on, you may prefer another option.

After trying two flavors, our tester didn’t notice any adverse side effects. Our team also likes that this product is available on Amazon Prime, so you can get it delivered in a matter of days.

Read More

Read our full Optimum Nutrition Gold Standard Casein Review.

Best Casein Protein for Baking and Pudding: Dymatize Elite Casein

Dymatize Elite Casein
Dymatize Elite Casein
Dymatize Elite Casein

This casein mixes well and has an unusual, low-fat creamer that makes for a great flavor. Each single-scoop serving provides 25 grams of protein and is sugar-free.

Shop Amazon

Specs

  • Protein: 25g
  • Flavors: Chocolate, Chocolate and Peanut Butter, Chocolate and Whey Protein Powder, Cinnamon Bun, Cookies & Cream, Vanilla
  • Sweeteners Used: Sucralose
  • Third-Party Testing: Informed Choice Certified
  • Price per Serving: $1.33
Pros
Thick consistency for baking/pudding
Budget-friendly
Wide flavor variety
Cons
Sweetened with sucralose
Not the leanest pick

Why We Like It

Protein powders are pretty versatile and make great baking (or, for casein, pudding) companions. Dymatize’s Elite Casein has a thick consistency, making it easy to bake into a pudding or use for baked goods. Plus, you get six flavor options, so it can work for just about any dessert flavor craving.

With 25 grams of protein and 5 grams of branched-chain amino acids (BCAAs) per serving, this protein powder can turn your desserts into muscle-building tasty treats. It contains just 1.5 grams of fat and 3 grams of carbs per serving. We like the formula overall—our testers awarded it a score of 3.75 out of 5 points—but it does contain some ingredients some individuals may prefer to avoid, like artificial flavors, sucralose, and maltodextrin. (13)

“The Cookies & Cream flavor makes an absolutely delicious pudding,” our tester said, giving the flavor a score of 4.5 out of 5. “You can also mix it with water as a shake, but it’s pretty thick and more ideal for a snack.” If you plan to bake with this product, know that adding water actually thickens the powder when mixed—this isn’t necessarily a bad thing but may affect your recipe.

dymatize elite casein tub
dymatize elite casein scoop
dymatize casein pudding
dymatize elite casein tub
dymatize elite casein scoop
dymatize casein pudding

“After having this protein, I felt really full,” our tester said, giving the side effects a 4 out of 5. “I’m not exactly sure why, though, because the ingredients aren’t different from any of the other casein products I’ve tried.” It could be that this tester experienced some bloating from the artificial sweetener sucralose in this product, but it’s hard to say for sure. (13) 

This product holds the NSF Informed Choice certification, earning a score of 5 out of 5 points for third-party testing. And our team also liked the approachable price point. One 50-serving container is about $66.48 (depending on the flavor you choose), making it roughly $1.33 per serving.

Read More

[Related: Dymatize Iso 100 Protein Powder Review — Is Hydrolyzed Best?]

Best Casein Protein for Athletes: Ascent Native Fuel Micellar Casein

Ascent Native Fuel Micellar Casein
Ascent Native Fuel Micellar Casein
Ascent Native Fuel Micellar Casein

This slow-digesting protein powder is all-natural, soy-free, and tested for banned substances by Informed Sport. It's available in three different flavors in either a 32 or 64-ounce pounch.

Shop Amazon

Specs

  • Protein: 25g
  • Flavors: Chocolate, Chocolate Peanut Butter, Vanilla
  • Sweeteners Used: Monk fruit extract
  • Third-Party Testing: Informed Sport Certified
  • Price per Serving: $1.70
Pros
Informed Sport Certified
No added sugars
Lean formula
Cons
Pricey
Only three flavors

Why We Like It

For competing athletes, finding products that are safe for sport is a priority. Ascent Native Fuel Micellar Casein is Informed Sport Certified, meaning it doesn’t contain any banned substances and is acceptable for athletes. That being said, every athlete’s body is different. While this product is safe for sport, it’s best to consult a registered dietitian or coach before trying a new supplement.

We liked the formula here, as it offers 25 grams of protein with one and a half grams of fat and six carbs. The carb count is ever-so-slightly higher than other products on this list but athletes may actually like the extra fuel. It also contains no added sugars or artificial sweeteners. Altogether, our testers rated the formula with 4.5 out of 5 points.  

Ascent Casein scoop
Ascent Casein jar
Ascent Casein label
ascent casein nutrition
Ascent Casein scoop
Ascent Casein jar
Ascent Casein label
ascent casein nutrition

Unfortunately, our testers weren’t huge fans of the Chocolate Peanut Butter flavor. “I really wish I’d liked this but the taste is just a little off-putting,” they said, giving it 2.75 out of 5 points for flavor. “The peanut butter tastes artificial and I even tried mixing it into a smoothie with milk and banana.” We haven’t yet tried the chocolate or vanilla casein protein powder from Ascent, but maybe you’ll have better luck with those. 

When it comes to solubility, we gave this product a score of 3 out of 5. Our tester thought this one was really thick and difficult to drink even after letting it chill. But if you want to make protein pudding or ice cream (by freezing the mixture), it may actually work really well. 

At $1.70 per serving, this isn’t the cheapest casein protein on this list. We gave the price per serving a score of 3 out of 5, as you can definitely find casein products for around $1.50 per serving and sometimes even less. That being said, if you’re a competing athlete who needs to prioritize supplements that are safe for sport, this casein ticks that box.

Read More

Read our full Ascent Native Fuel Micellar Casein Review.

How We Tested and Chose the Best Casein Proteins

Our team of BarBend experts, including personal trainers, certified nutrition coaches, and athletes, tested more than 100 different protein products to help narrow down all the best casein proteins. As we sampled different options, these are the factors we considered using our supplement testing methodology.

  • Formula: We looked at the amount of protein per serving relative to carbohydrates and fat. We opted for casein products that contained mostly protein with few other macros. We also prioritized products that had as few added ingredients, such as sweeteners and dyes, as possible.
  • Flavors: We know that flavor is a pretty subjective factor, so we tried to prioritize options with multiple taste options. Our testers also tried to sample as wide a variety of flavors as possible.
  • Solubility: In some cases, a shaker cup may not help the product sufficiently dissolve. Not everyone wants to pull out the blender to make a protein shake, so we made sure that each of the options on this list dissolved well using just a blender ball.
  • Third-Party Testing: As often as possible, we like to prioritize products that have been third-party tested. That helps ensure that the products are free of banned substances and actually contain the contents written on the label.

[Related: Best Whey Protein Powders]

Benefits of Casein Protein

As most gym-goers know, protein is an extremely important macronutrient for building muscle mass and making strength gains. It’s also important for muscle recovery. (15) It is one of three macronutrients, and it’s one of your greatest tools when it comes to hitting your gym goals. So why choose casein?

  • Supplement protein needs: For many people, it can be difficult to consume the amount of daily protein needed to assist muscle repair and growth, so a supplement like casein can be of great benefit for adding in an easy 20 grams (or more) of protein. 
  • Complete protein: Casein comes from cow’s milk, which makes it a complete protein that contains all nine essential amino acids, including the ever-important BCAAs (leucine, isoleucine, and valine).  (16)
  • Slower-digesting: Many people opt for a casein protein over other types because it may have better potential benefits when taken right before bed, which some people prefer over traditional use right after a workout. One study suggested that when casein is ingested right before bed, it may have the ability to increase muscle protein synthesis during sleep for better muscle mass and strength gains. (2)
  • Adds variety: Utilizing a casein supplement may also make hitting your protein goals a little more interesting and enjoyable. If you’re tired of chicken breasts and eggs, casein may be a fun alternative to get an easy 20 or more grams of protein in a quick snack. Casein can be made into a delicious pudding consistency, or when frozen, an ice cream texture, which makes it a macro-friendly dessert or treat you won’t soon tire of.

How Much Does Casein Protein Cost?

Casein protein can cost anywhere from about $1.40 per serving up to $2.50 per serving. The cost per tub varies depending on how many servings are in the tub, among other factors. 

Best Casein ProteinTransparent Labs Casein$1.99/serving
Best Tasting Casein ProteinLegion Casein+$2/serving
Best Casein Protein for DigestionNaked Nutrition Casein$1.05/serving
Best Natural Casein ProteinMuscle Feast Grass-Fed Micellar Casein$1.28/serving
Best Budget Casein ProteinOptimum Nutrition Gold Standard Casein$1.52/serving
Best Casein Protein for Baking and PuddingDymatize Elite Casein$1.33/serving
Best Casein Protein for AthletesAscent Native Fuel Micellar Casein$1.70/serving

What To Consider Before Buying Casein Protein

Whether this is a new supplement in your routine or you’ve been taking it for a while, there are a few things worth thinking about before making the purchase.

Casein Type

Many companies act like it’s a huge deal that they only use micellar casein — the kind that’s encased in a globular structure called a micelle. But the vast majority of casein powders use micellar casein; this isn’t unusual. Calcium caseinate and hydrolyzed casein are less common and more processed, so micellar casein is typically the way to go. 

Formula 

Take a gander at the macronutrient ratio and make sure the protein powder you’re interested in is really a protein powder—that is, it doesn’t contain excess carbs and/or fats when what you want is protein. Look for a maximum of 3 grams of fat and 6 grams of carbohydrates. 

Also look at the ingredients list to ensure it doesn’t contain anything you don’t want to consume, such as artificial sweeteners, artificial flavors, or preservatives. (13)(17)

Solubility

This is a huge advantage that casein has over whey. If you add water or (even tastier) milk to casein in a 3:2 ratio and stir it up for a few minutes, it becomes a pudding-like substance. Eat it straight away or freeze it for a few hours, and it becomes ice cream (which you can then blend up with additional liquid to make a milkshake—yum). If you plan on making either pudding or ice cream with your casein powder, make sure you select a preferable flavor for doing so. 

However, this consistency may not be ideal for every athlete. Instead, some may prefer a standard shake. So, before you buy, consider your purposes for the supplement.

Flavor

If you’re going to be consuming a casein protein relatively frequently, you want a flavor that you actually enjoy. So, read product reviews carefully to settle on a taste that you won’t get sick of. Also, if you plan to bake with your casein, we recommend opting for a flavor that’s versatile, like chocolate or vanilla.

[Related: Does The Ketogenic Diet Work For Strength Training?]

Whey vs. Casein: Is One Better?

Both whey and casein are sourced from milk (they get separated in the cheesemaking process), and they’re both really high quality proteins (meaning they contain all your essential amino acids). But the question remains: Is one superior to the other?

By and large, research tells us no. In one commonly cited study, police officers who supplemented a low-calorie diet with casein lost more fat and gained more strength than police officers who supplemented a low-calorie diet with whey protein. (3) But since then, a bulk of research has concluded that there is no practical difference in the muscle-building activity between whey and casein protein. (4)(5)(6)

What research has told us is that both whey and casein may have superior effects compared to certain vegan protein powders, (7)(12) though that notion has also been challenged by more recent research. (8)(9)One thing worth considering is that casein digests more slowly than whey, so some find it to be a little more filling, though research isn’t unanimous. (10)(11)(12) While both whey and casein are great ways to manage appetite, if hunger is a big obstacle for you, then casein could potentially be a better pick. Also, you may be able to find a whey casein blend to get the best of both worlds.

[Related: IIFYM (If It Fits Your Macros): Your Ultimate Guide To This Diet]

Casein Protein Powder FAQs

Is casein or whey better for weight loss?

Neither one of these milk proteins are superior for weight loss. Neither protein is more anabolic or “fat burning.” However, casein does digest more slowly so some find it a more filling snack. If it helps you eat less, it’s a good supplement for weight loss.

Does casein protein powder contain lactose?

It has very little lactose, less than whey protein, however it’s not always lactose-free. If there’s no sugar on the label then there’s under half a gram of lactose per serving, and probably none. But people with serious allergies should contact the manufacturer to confirm.

Should I have casein protein before bed?

Casein is a slow-digesting protein, so it will release amino acids into your bloodstream for a longer period of time than a lot of other proteins, like whey. The slower digestion rate can make it more filling and might prevent midnight snacking, but it doesn’t make it more “anabolic” than other protein.

How much do casein protein powders cost?

Casein is on par price-wise to whey protein. All of our top picks fall between about $1.00 to $2.00 per serving with an average of around $1.61. Depending on quality, ingredients, and options to buy in bulk, you will see the price fluctuate.

What is the best casein protein?

After doing a deep dive into all of the top-tier choices this list of casein has to offer, we decided that Transparent Labs Casein is our top choice. The formula is all-natural and derived from 100 percent grass-fed cows. Not to mention, it provides 25 grams of protein per serving. It comes in chocolate or vanilla flavors and is sweetened with stevia.

References

  1. Abbott, W., Brett, A., Cockburn, E., & Clifford, T. (n.d. ). Presleep Casein Protein Ingestion: Acceleration of Functional Recovery in Professional Soccer Players. International Journal of Sports Physiology and Performance, 14(3), 385-391. https://doi.org/10.1123/ijspp.2018-0385
  2. Kim J. Pre-sleep casein protein ingestion: new paradigm in post-exercise recovery nutrition. Phys Act Nutr. 2020;24(2):6-10. https://doi:10.20463/pan.2020.0009 
  3. Demling RH, DeSanti L. Effect of a hypocaloric diet, increased protein intake and resistance training on lean mass gains and fat mass loss in overweight police officers. Ann Nutr Metab. 2000;44(1):21-29. https://doi:10.1159/000012817 
  4. Trommelen, J., van Lieshout, G.A.A., Pabla, P. et al. Pre-sleep Protein Ingestion Increases Mitochondrial Protein Synthesis Rates During Overnight Recovery from Endurance Exercise: A Randomized Controlled Trial. Sports Med 53, 1445–1455 (2023). https://doi.org/10.1007/s40279-023-01822-3 
  5. Wilborn CD, Taylor LW, Outlaw J, et al. The Effects of Pre- and Post-Exercise Whey vs. Casein Protein Consumption on Body Composition and Performance Measures in Collegiate Female Athletes. J Sports Sci Med. 2013;12(1):74-79. https://pubmed.ncbi.nlm.nih.gov/24149728/ 
  6. Fabre M, Hausswirth C, Tiollier E, et al. Effects of Postexercise Protein Intake on Muscle Mass and Strength During Resistance Training: Is There an Optimal Ratio Between Fast and Slow Proteins?. Int J Sport Nutr Exerc Metab. 2017;27(5):448-457. https://doi:10.1123/ijsnem.2016-0333 
  7. Kanda A, Nakayama K, Sanbongi C, Nagata M, Ikegami S, Itoh H. Effects of Whey, Caseinate, or Milk Protein Ingestion on Muscle Protein Synthesis after Exercise. Nutrients. 2016;8(6):339. Published 2016 Jun 3. https://doi:10.3390/nu8060339 
  8. Banaszek A, Townsend JR, Bender D, Vantrease WC, Marshall AC, Johnson KD. The Effects of Whey vs. Pea Protein on Physical Adaptations Following 8-Weeks of High-Intensity Functional Training (HIFT): A Pilot Study. Sports (Basel). 2019;7(1):12. Published 2019 Jan 4. https://doi:10.3390/sports7010012 
  9. Messina M, Lynch H, Dickinson JM, Reed KE. No Difference Between the Effects of Supplementing With Soy Protein Versus Animal Protein on Gains in Muscle Mass and Strength in Response to Resistance Exercise. Int J Sport Nutr Exerc Metab. 2018;28(6):674-685. https://doi:10.1123/ijsnem.2018-0071 
  10. Abou-Samra, R., Keersmaekers, L., Brienza, D., Mukherjee, R., & Macé, K. (2011). Effect of different protein sources on satiation and short-term satiety when consumed as a starter. Nutrition journal, 10, 139. https://doi.org/10.1186/1475-2891-10-139  
  11. Dhillon, J., Craig, B. A., Leidy, H. J., Amankwaah, A. F., Osei-Boadi Anguah, K., Jacobs, A., Jones, B. L., Jones, J. B., Keeler, C. L., Keller, C. E., McCrory, M. A., Rivera, R. L., Slebodnik, M., Mattes, R. D., & Tucker, R. M. (2016). The Effects of Increased Protein Intake on Fullness: A Meta-Analysis and Its Limitations. Journal of the Academy of Nutrition and Dietetics, 116(6), 968–983. https://doi.org/10.1016/j.jand.2016.01.003  
  12. Bendtsen LQ, Lorenzen JK, Bendsen NT, Rasmussen C, Astrup A. Effect of dairy proteins on appetite, energy expenditure, body weight, and composition: a review of the evidence from controlled clinical trials. Adv Nutr. 2013;4(4):418-438. Published 2013 Jul 1. https://doi:10.3945/an.113.003723
  13. Del Pozo, S., Gómez-Martínez, S., Díaz, L. E., Nova, E., Urrialde, R., & Marcos, A. (2022). Potential Effects of Sucralose and Saccharin on Gut Microbiota: A Review. Nutrients, 14(8), 1682. https://doi.org/10.3390/nu14081682
  14. Hernández-Camacho, J. D., Vicente-García, C., Parsons, D. S., & Navas-Enamorado, I. (2020). Zinc at the crossroads of exercise and proteostasis. Redox biology, 35, 101529. https://doi.org/10.1016/j.redox.2020.101529
  15. Carbone, J. W., & Pasiakos, S. M. (2019). Dietary Protein and Muscle Mass: Translating Science to Application and Health Benefit. Nutrients, 11(5), 1136. https://doi.org/10.3390/nu11051136
  16. Church, D. D., Hirsch, K. R., Park, S., Kim, I. Y., Gwin, J. A., Pasiakos, S. M., Wolfe, R. R., & Ferrando, A. A. (2020). Essential Amino Acids and Protein Synthesis: Insights into Maximizing the Muscle and Whole-Body Response to Feeding. Nutrients, 12(12), 3717. https://doi.org/10.3390/nu12123717
  17. Kong, W., Xie, Y., Hu, J., Ding, W., & Cao, C. (2024). Higher ultra processed foods intake is associated with low muscle mass in young to middle-aged adults: a cross-sectional NHANES study. Frontiers in nutrition, 11, 1280665. https://doi.org/10.3389/fnut.2024.1280665

About Amanda Capritto, CPT, CSNC, CPS

Amanda is a content writer and journalist in the outdoors, fitness, and wellness niches. She is a certified personal trainer and sports nutrition coach who helps people reach their most exciting outdoor adventure goals. She is the coach who can help you prepare to climb Half Dome or kayak the Wilderness Waterway in the Florida Everglades.

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