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Isopure Zero Carb vs Dymatize ISO100

Updated By the HealthWorld editorial teamHow we pick

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The short answer

These two are closer than most comparisons: both are whey isolates with 25 g of protein per serving. Isopure Zero Carb is the pick for keto and strict low-carb diets, with 0 g of carbs and sugar per serving. ISO100 is hydrolyzed, which many people find light and easy to digest, and it's very low in fat and sugar. If carbs aren't a concern, choose on taste and price per serving.

Isopure Zero Carb Whey Isolate

Choose Isopure Zero Carb Whey Isolate if…

  • You follow a keto or strict low-carb diet
  • You want 0 g of carbs and sugar per serving
  • You'd like an unflavored, unsweetened version
Dymatize ISO100 Hydrolyzed

Choose Dymatize ISO100 Hydrolyzed if…

  • You want a hydrolyzed isolate that's light on the stomach
  • You mainly use protein after training
  • A very small amount of carbs doesn't matter to you

Side by side

Isopure Zero Carb Whey IsolateDymatize ISO100 Hydrolyzed
Protein per serving25 g25 g
Protein type100% whey isolateHydrolyzed whey isolate
Carbs0 gVery low
Sugar0 gVery low
Diet fitKeto and low-carbLow-fat, low-sugar
Best forCarb countingPost-workout

Where to buy

Frequently asked questions

Is Isopure or ISO100 better for weight loss?

Both are low in calories for the protein they provide, so either can help you hit your protein target in a calorie deficit. Isopure's 0 g of carbs suits low-carb plans; otherwise the difference is small, and taste and price per serving should decide.

Is protein powder better with milk or water?

With an isolate, water keeps calories and lactose to a minimum, which is often the reason people choose isolate in the first place. Milk adds calories, extra protein and creaminess. Both work for building muscle.

How much protein powder per day?

One or two scoops a day is typical, used to fill gaps rather than replace meals. What matters most is your total daily protein from food and shakes combined. If you have kidney issues, ask your doctor how much protein is right for you.

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