Dymatize ISO100 vs Optimum Nutrition Gold Standard Whey
Updated By the HealthWorld editorial teamHow we pick
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The short answer
Both are trusted, best-selling wheys with similar protein per scoop: 25 g for ISO100 and 24 g for Gold Standard. Choose ISO100 if you want a pure, hydrolyzed whey isolate with very little fat and sugar, or you find regular whey heavy on your stomach. Choose Gold Standard if you want a dependable everyday all-rounder with a huge flavor range and don't need a pure isolate.
Choose Dymatize ISO100 Hydrolyzed if…
- You want a pure whey isolate with very little fat and sugar
- Regular whey feels heavy or hard to digest
- You mainly drink protein after training
Choose Optimum Nutrition Gold Standard 100% Whey if…
- You want a classic all-rounder for everyday use
- Flavor choice matters to you, including an unflavored option
- You don't need a pure isolate
Side by side
| Dymatize ISO100 Hydrolyzed | Optimum Nutrition Gold Standard 100% Whey | |
|---|---|---|
| Protein per serving | 25 g | 24 g |
| Protein type | Hydrolyzed whey isolate | Whey blend; isolate is the primary ingredient |
| Fat and sugar | Very low | Low, though blends usually have a little more than pure isolate |
| Lactose | Very little (isolate) | A little more than a pure isolate |
| Mixing | Light texture | Mixes with just a shaker |
| Best for | Post-workout, sensitive stomachs | Everyday all-round use |
Where to buy
Frequently asked questions
Is Dymatize ISO100 better than Gold Standard?
Not across the board. ISO100 is a purer, hydrolyzed isolate, which suits people who want minimal fat and sugar or find whey heavy. Gold Standard is an isolate-led blend with nearly the same protein per scoop. For building muscle, the two perform similarly when you hit your daily protein target.
Which is better if you're lactose intolerant?
ISO100, as a pure isolate, contains very little lactose and is often better tolerated by people with mild lactose intolerance. Gold Standard is mostly isolate but includes other forms of whey. Neither is suitable if you have a milk allergy.
Can you take protein powder and creatine at the same time?
Yes. Either protein works well with a scoop of unflavored creatine stirred in, and there's no known interaction between the two.
Sources
- Dietary Supplements for Exercise and Athletic Performance — NIH Office of Dietary Supplements
- Dietary Supplements — U.S. Food & Drug Administration