But given the raging popularity of protein powders and the potential advantages of picking casein, how do you decide which is the best casein for you? We’ve tried dozens to land on this list;

There are two types of protein in milk, whey and casein, and many prefer casein protein powder because it digests more slowly, it’s more filling, and because of its molecular structure it’s really easy to make puddings and ice cream out of it. So take a look at our list of the greatest casein proteins! Maybe you’re after the best tasting, the best all natural, or the best value — you’ll find what you’re looking for here.

Best Casein Proteins

Best Casein: Transparent Labs Grass-Fed Casein

Sometimes, a simple and straightforward product gets the job done better than almost anything else. And our top casein pick is a newer entry to the market that has everything we want to see from a casein product without a lot of fluff.

Transparent Labs 100% Grass-Fed Casein Highlights

For a low-fat protein product, the grass-fed versus grain-fed debate matters a bit less. However, Transparent Labs has opted to source their casein from 100% grass-fed cows, and they’ve managed to stack up well with the broader market. Their casein is incredibly low in fat — just half a gram per serving — and very high in calcium, with 60% of the daily recommended value per scoop. It’s relatively low in carbohydrates, too. 

It’s also free of artificial flavors, colors, and ingredients. One potential knock is that there aren’t a wide variety of flavors yet available.

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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. Use code BARBEND10 to save 10%.

Who Should Buy Transparent Labs 100% Grass-Fed Casein

  • Anyone who wants a casein supplement free of artificial flavors, colors, and ingredients.
  • Buyers who prefer grass-fed dairy products.
  • People looking for a casein very low in fat.

Who Shouldn’t Buy Transparent Labs 100% Grass-Fed Casein

  • Customers who want a wide variety of flavors to pick from.
  • People always drinking casein on the go. Casein is generally taken by athletes at night, but some prefer it mid-day. This isn’t the best-mixing casein we’ve tried, so it might get a little too thick in some shaker bottles.

Transparent Labs took their time in releasing a casein product, and we’re glad they finally did. There’s a lot to like here, though it’s not the perfect option for everyone.

Best Casein for Ingredients: Legion Casein+

For all natural, high quality supplements, we often look to Legion. Known for their vast array of research backed products, their casein rates very highly.

legion casein bench

Legion Casein+ Highlights

Legion Athletics is a newer supplement company but it’s become well known for producing a range of high quality, all natural products. The casein is sourced from free roaming Irish dairy cows, and while it’s not technically 100 percent grass-fed (they have to come inside in the winter), it’s still a great quality product made from cows that spend a ton of time outside and that aren’t treated with bovine growth hormone. They’re also big on sourcing casein from sustainable farms. It’s also completely free from artificial flavors and sweeteners, low in fat, and higher in protein than most other caseins we’ve seen.

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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. Use code "BARBEND" for 20% off!

Who Should Buy Legion Casein+

  • If you have concerns about conventionally raised dairy, you’ll be glad to learn this casein is sourced from cows that free roam in small, Irish dairy farms.
  • Folks who want as much protein as they can get: It’s among the most protein-dense caseins we’ve seen.
  • People who prefer all natural supplements: there are no artificial flavors or sweeteners in the product.

Who Should Buy Legion Casein+

  • Anyone who wants to save money: given all the quality controls, it may not be surprising that this is one of the pricier casein products.
  • The ingredients include soy lecithin, which helps with mixability but isn’t great for folks with soy allergies. (Or folks who just try to limit soy.)

Legion has landed a lot of high profile athlete sponsorship deals for good reason: they back up their claims with science and they use high quality ingredients. If you want down-to-Earth supps without the razzle dazzle, this is a solid bet.

Best Casein for Digestion: Optimum Nutrition Gold Standard Casein

The world’s most famous casein, for this category we needed a supplement that had a lot of protein per calorie, that tasted good, that was reasonably priced, and had specific additions to aid digestion. 

Optimum Nutrition Casein on weights

Optimum Nutrition Gold Standard Highlights

Optimum Nutrition’s casein is a top rated casein for many reasons. A big draw is the fact that it has a wider range of flavors available than any other casein we’ve seen on the market. It’s also very high in calcium — 50 percent of the recommended intake per scoop — but what really elevates it is the inclusion of digestive enzymes, which may improve the speed at which the protein is absorbed.

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

A well rounded, well priced casein that contains enzymes that might improve its digestion.

Who Should Buy Optimum Nutrition Gold Standard Casein

  • Anyone with an interest in maximizing absorption; Gold Standard Casein contains Aminogen®, a blend of digestive enzymes that some research suggests may improve the absorption rate of the protein.
  • People looking for a wide range of flavors; Optimum Nutrition provides more flavors for their casein than any of their competitors we’ve seen.
  • Folks looking for a casein that’s low in cholesterol and high in calcium.  

Who Shouldn’t Buy Optimum Nutrition Gold Standard Casein

  • The ingredients include artificial flavors and artificial sweeteners, which some try to avoid.
  • Soy lecithin is on the ingredients list, which improves mixability and texture, but some customers eschew soy.

Optimum Nutrition is about the most popular company in sports supplementation, which means they can keep prices low and expand their flavors and offerings. All that combined with a good reputation among third party testers means it’s easy to see why the products are so valued.

Best Tasting Casein: Dymatize Elite Casein

Taste, of course, is subjective, but the category casein is an unusual one: everybody in the BarBend office and just about everyone online happens to agree on this flavor taking the cake. (Er, bun.)

dymatize elite casein tub

Dymatize Elite Casein Highlights

Dymatize Elite is very well known for its surprisingly tasty casein. If flavor is your priority, the Cinnamon Bun flavor is consistently touted as perhaps the best tasting casein on Earth. This can be attributed in part to an unusual low calorie creamer, made from sunflower oil and maltodextrin, that makes for a creamy, frosting-y flavor despite containing just 1.5 grams of fat per scoop and no sugar. 

Dymatize Elite Casein
Dymatize Elite Casein
Dymatize Elite Casein

A casein that mixes well and has an unusual, low fat creamer that makes for a great flavor.

Who Should Buy Dymatize Elite Casein

  • Anyone who wants to reduce their sugar intake: there’s no sugar at all here. 
  • Athletes: this product is certified by Informed Choice. While not quite as rigorous as the certification of Informed Sport, Informed Choice tests the production facility for banned substances, which may bring peace of mind to competitive athletes.
  • People looking to increase their calcium. With 60 percent of the recommended daily intake per serving, this is higher than your average casein.

Who Shouldn’t Buy Dymatize Elite Casein

  • This protein powder contains two artificial sweeteners (sucralose and acesulfame potassium) as well as artificial flavors, which some consumers prefer to avoid.
  • The ingredients also include soy lecithin, which helps to improve the texture and mixability, but puts the product off limits for those who avoid soy.

Once again, taste is subjective, but Dymatize benefits from outstanding word of mouth and a casein line with four different flavors, so you’re likely to find something to suit your palate.

Best Value Casein: Muscle Feast Grass Fed Micellar Casein

It can be hard to find a good combination of quality and value when it comes to protein powders. But across all their products and in particular their casein, we’ve found Muscle Feast to stand out from the pack. 

Muscle Feast Grass Fed Micellar Casein

Muscle Feast Grass Fed Micellar Casein Highlights

Muscle Feast is a supplement company that produces high quality products that are remarkably inexpensive, and their casein fits the bill. With 37 servings per two-pound tub or, for greater savings, 75 servings in 4 pounds, the cost per gram of protein is lower than the vast majority of casein products.

Add all that to the fact that it’s all natural, soy free, and grass fed, and there’s a clear case for this being the best value casein on the market.

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

An inexpensive, all natural casein sourced from grass fed cows.

Who Should Buy Muscle Feast Grass Fed Micellar Casein

  • Penny pinchers: on a cost-per-gram-of-protein basis, this casein delivers the best value on the market.
  • The all natural crowd: the product contains no artificial flavors or sweeteners.
  • Paleo types: while it is dairy, Muscle Feast’s casein is totally free from soy and it comes from grass fed cows, two factors that are typically important among Paleo adherents.

Who Shouldn’t Buy Muscle Feast Grass Fed Micellar Casein

  • Those buying it because it’s grass fed. It is higher in beneficial fatty acids but given how low fat protein powders are, there aren’t really any practical health benefits relative to conventional dairy. That said, grass fed cows do spend more time outside, so it could be worth it for those who prefer dairy made from free roaming cows.  
  • Those who want the best tasting protein powder. This protein is good, but the fact that it’s all natural means it’s not the most scrumptious available.

It’s easy to confuse inexpensive with poor quality, but Muscle Feast doesn’t fall victim to that trap. For low cost, effective supplements, we often turn to Muscle Feast.

Best Casein for Athletes: Ascent Native Fuel Micellar Casein 

How do you decide on the best protein for athletes? Third party testing. Companies like Informed Choice, Informed Sport, and NSF test batches and/or facilities for banned substances.

Ascent Casein jar

Ascent Native Fuel Micellar Casein Highlights

Ascent provides all the regular features of casein — quality protein, slow digestion — but with a couple of extra benefits for athletes. The most important is that it’s certified by Informed Sport, a third party testing company that batch tests supplements to make sure they’re free from banned substances. (Many athletes only consume supplements with this certification, and it’s considered more rigorous than Informed Choice, which “only” tests the facilities in which they’re made.)

Add that to the facts that it’s soy free and contains more carbs than usual (6 grams per 25 grams of protein) and you’ve got a great option for athletes and non-athletes alike.

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

A slow digesting protein powder that's all natural, soy free, and tested for banned substances by Informed Sport.

Who Should Buy Ascent Native Fuel Micellar Casein

  • Athletes. Native Fuel is tested by Informed Choice, a company that ensures the product is free from substances banned in athletic competitions.
  • People who avoid artificial flavors and sweeteners — there are none to be found here.  
  • The ingredients don’t include any gluten or soy, qualities valued by “all natural” and Paleo folks.

Who Shouldn’t Buy Ascent Native Fuel Micellar Casein

  • People looking to minimize their carb intake. With 6 grams per scoop, this is higher in carbs than usual. This is certainly not necessarily a “con” for everyone, but if you’re restricting carbs then this isn’t the best casein.
  • Penny pinchers. This casein is relatively pricey compared to other options.
  • There are three types of gums here (guar, acacia, and xanthan), which a very small portion of the population may have trouble digesting.

Ascent has a solid reputation among functional fitness athletes and influencers like Tim Ferriss. It’s not the cheapest casein, but it’s a standout for athletes — very few caseins are certified by Informed Sport, and it’s earned the product endorsements from several athletes.

MuscleTech Nitro Tech Casein Gold powder

How We Decide the Best

There are several factors we looked at — and dozens of products — that helped us to come up with this list of the best casein protein powders. Here’s the criteria we decided were the most important for the average gym goer.

Calories Per Gram of Protein

We are, after all, talking about protein powder! People buy these products to get as much protein out of a scoop as they can, so we assessed the amount of protein one finds in a serving relative to the carbohydrates and fat — in other words, how much of each calorie you consume is protein? 25 grams of protein with 4 grams of carbs and no fat would be 116 calories overall and 4.64 calories per gram of protein. That’s a very good (low) score; a product with more carbs and fat might have you consuming, say, 9 or 10 calories for every gram of protein consumed. 

Price

There’s calories per gram of protein and cents per gram of protein, because, again, the product isn’t bought for the amount of scoops it provides but the amount of protein it provides. Five or so cents per gram of protein is solid value, but we’d allow more so long as the product offered something exceptional, like a lot of protein per calorie or…

Enzymes

You might have noticed our first pick contains digestive enzymes, which might help with protein absorption. This is very rare, but other handy additives that are sometimes seen in casein products include lactase, which may lower the odds of indigestion among those with lactose allergies, and vitamins and minerals.

Flavor Range

This is where larger companies tend to gain an edge: the more product a company sells, the more flavors they can play with. Optimum Nutrition has a famously wide range of flavors for most of their products, including their casein. 

Controversial Ingredients

We would never say that you should avoid soy, assuming your doctor hasn’t told you to. There’s no good evidence it decreases testosterone, but the fact remains that a lot of people try to avoid it just in case it does. The same goes for gluten, artificial sweeteners, and corn: if you’re healthy and you eat a balanced diet they shouldn’t cause health problems, but it’s fine if you’d rather avoid them anyway. We noted their presence in our list. 

Whey Vs Casein

Whey Vs Casein: Is One Better?

They’re both 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 is one superior to the other?

One study was published in 2000 that many consider a definitive answer: 38 police officers on low calorie diets were split into three groups: high protein with whey, high protein with casein, and a group that was just low calorie.(1) After 12 weeks the casein group lost fifty percent more fat and gained thirty percent more strength than the whey group.

But that study was small and is broadly considered a one-off: many others have found no practical difference between whey and casein with regard to muscle gain or athletic performance.(2)(3)(4)

That said, casein is lower in lactose and it digests more slowly than whey, so some find it to be a little more filling, though research isn’t unanimous.(5)(6)(7) 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.

It tends to be slightly more expensive, though, because casein can be used to make cheese while whey has historically been considered a waste byproduct of the cheesemaking process.

Before Buying Casein

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

Most Casein Powders are Micellar Casein

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.

You Can Make Pudding With Casein

This is a huge advantage 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!

Whey Vs Casein

As noted above, there doesn’t seem to be any practical difference between these two protein powders when it comes to muscle gain or athletic performance. 

Wrapping Up

There are plenty of good reasons to experiment with casein protein, and given it usually costs just an extra cent or two more than whey per gram of protein, the “more expensive” label shouldn’t be too much of a deterrent. Pick the best casein for you, and enjoy!

Frequently Asked Questions

Is casein or whey better for weight loss?

Neither whey nor casein 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.

References

1. Demling, RH, et al. 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): 21-9.
2. Messina M, Lynch H, et al. “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 May 3:1-36.
3. Wilborn CD, Taylor LW, et al. The Effects of Pre- and Post-Exercise Whey vs. CaseinProtein Consumption on Body Composition and Performance Measures in Collegiate Female Athletes. J Sports Sci Med. 2013 Mar 1;12(1):74-9.
4. Fabre M, Hausswirth C, 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 Oct;27(5):448-457.
5. Boirie Y, et al. Slow and fast dietary proteins differently modulate postprandial protein accretion. Proc Natl Acad Sci U S A. 1997 Dec 23;94(26):14930-5.
6. Abou-Samra R, et al. Effect of different protein sources on satiation and short-term satiety when consumed as a starter. Nutr J. 2011 Dec 23;10:139.
7. Bendtsen LQ, et al. Effect of dairy proteins on appetite, energy expenditure, body weight, and composition: a review of the evidence from controlled clinical trials. Adv Nutr. 2013 Jul 1;4(4):418-38.