Isopure Low Carb Whey Protein Review
Isopure Low Carb Whey Protein Review

Isopure is best-known for their low-carb and zero-carb products, and it’s a particularly popular brand among athletes following ketogenic diets.

While their zero-carb protein powder is their most famous product, their low-carb protein powder delivers just 3 grams of carbohydrates (and 1 gram of fiber) for every fifty grams of protein. That’s less than half the carbs you’ll find in most of their competitors, like Optimum Nutrition.

So, what does Isopure Low Carb Protein Powder taste like, and do the cons outweigh the pros? I tried their Dutch Chocolate flavor to see how it holds up.

Click HERE to shop Isopure Low Carb.

Isopure Low Carb Protein Powder Nutrition Facts

At two scoops or 65 grams, one serving of Isopure is unusually large and provides 50 grams of protein, 3 grams of carbs, 1 gram of fiber, and 1 gram of fat.

What’s notable besides the carb content is the amount of micronutrients. A two-scoop serving provides fifty percent of your recommended daily intake of Vitamins, A, C, E, K, B6, B12, thiamin, riboflavin, biotin, magnesium, zinc, selenium, copper, manganese, chromium, and a few other minerals. And while most protein powders provide a decent amount of calcium (about ten or fifteen percent per scoop), IsoPure has thirty-five percent of your daily calcium in a scoop (seventy in a serving). Although here it’s worth pointing out that the body probably won’t absorb more than 50 percent of your RDI at a time.

This is the first protein powder I’ve seen that tries to double as a multivitamin.

[See our top whey protein powders picks]

Isopure Low Carb Protein Powder Nutrition Facts
Isopure Low Carb Protein Powder Nutrition Facts

We couldn’t find a third party test of this particular protein, but Isopure’s Zero Carb protein advertises 50 grams of protein per serving and was found by Labdoor to have an average of 45.7 grams of protein, which is a good result and still above average as far as protein-per-calorie goes.

Isopure Low Carb Protein Powder Ingredients

A lot of whey powders combine whey isolate, concentrate, and hydrolyzed whey as they each have their own benefits. Isopure Low Carb decided to stick with one kind: whey protein isolate, which has the highest amount of protein per gram and helps to keep the calore, fat, and carb-count as low as possible.

The rest of the ingredients are cocoa, a long vitamin and mineral blend, soy lecithin (probably to improve mixability), glutamine, xanthan gum (for thickening and stabilizing), an ambiguous “natural and artificial flavor,” and sucralose (also known as Splenda).

Isopure Low Carb Protein Powder Review
Isopure Low Carb Protein Powder Review

It’s worth noting that unlike a lot of protein powders, this is free from the sometimes-controversial artificial sweetener acesulfame potassium. That said, it does contain soy and sucralose, which some consumers may take issue with.

Isopure Low Carb also doesn’t contain digestive enzymes, so while it is lactose free, there’s a chance it could cause digestive issues for people with particularly sensitive stomachs.

Isopure Low Carb Protein Powder
Isopure Low Carb Protein Powder

Isopure Low Carb Protein Powder Price

Isopure comes in 1-, 3-, and 7.5-pound tubs, so we’ll take 3-pounds as the standard purchase. One tub delivers 21 servings for about $40.50, or $1.93 per serving.

That sounds expensive, but remember that one serving is unusually large, so it’s best to analyze IsoPure by cost per gram of protein, which is 3.86 cents.

That’s very cheap. Compare with Optimum Nutrition’s Gold Standard at 4.31 cents per gram of protein, BPI Sports Whey HD at 4.16 cents, Cellucor Cor Performance Whey at 4.61 cents, and 2 pounds of Pro Jym at 5.29 cents. (All of these costs are from the brands’ respective two-pound tubs.)

Isopure Low Carb Protein Powder Price
Isopure Low Carb Protein Powder Price


It mixes very well, probably because it contains soy lecithin. Even after leaving it unshaken for a few minutes, there’s no settling at the bottom.

Isopure Low Carb Protein Powder Taste

I tried Dutch Chocolate flavor, which tasted more like dark chocolate than a lot of its contemporaries. It’s quite sweet when mixed with whole milk, so if you don’t have much of a sweet tooth you may prefer it with water. But again, it tastes more like dark chocolate than milk chocolate, so expect a more cocoa-y and less creamy flavor when mixed with water.

The Takeaway

Isopure Low Carb is cheaper and delivers more micronutrients than many other protein powders on the market. The main problems a consumer may have are the inclusions of soy and sucralose and the exclusion of digestive enzymes. But if you don’t have any dietary restrictions or digestive issues, Isopure delivers a good amount of bang for your buck.

Isopure Low Carb Protein

Per Serving: $1.93












  • Very inexpensive
  • Extremely low in fat and carbs
  • Very high in vitamins and minerals
  • Lactose free


  • Contains soy
  • Contains sucralose
  • No digestive enzymes


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Nick is a content producer and journalist with over seven years’ experience reporting on four continents. His first articles about health were on a cholera outbreak in rural Kenya while he was reporting for a French humanitarian organization. His next writing job was covering the nightlife scene in Shanghai. He’s written on a lot of different kinds of things, but his passion for health ultimately led him to cover it full time.Shanghai was where he managed to publish his first health related article (it was on managing diarrhea), he then went on to produce a radio documentary about bodybuilding in Australia before he finished his Master’s degrees in Journalism and International Relations and headed to New York City. Here, he’s been writing on health full time for more than five years for outlets like Men's Health, VICE, and Popular Science.Nick’s interest in health kind of comes from an existential angle: how are we meant to live? How do we reach our potential? Does the body influence the mind? (Believe it or not, his politics Master’s focused on religion.)Questions like these took him through a lot of different areas of health and fitness like gymnastics, vegetarianism, kettlebell training, fasting, CrossFit, Paleo, and so on, until he realized (or decided) that strength training fit best with the ideas of continuous, measurable self improvement.At BarBend his writing focuses a little more on nutrition and long-form content with a heaping dose of strength training. His underlying belief is in the middle path: you don’t have to count every calorie and complete every workout in order to benefit from a healthy lifestyle and a stronger body. Plus, big traps are cool.