Gold Standard 100% Whey vs Dymatize ISO100
This is the most compared matchup in protein powder: the best selling whey blend against the best known hydrolyzed isolate. Gold Standard leads with whey isolate but includes concentrate, which brings a little more fat and sugar per scoop. ISO100 is hydrolyzed whey isolate, so its typical flavour runs leaner: around 25g of protein at roughly 120 calories with about 1g of sugar. The gap is real but smaller than the marketing suggests. Every number below is transcribed from the manufacturer’s nutrition label and verified by hand, then compared across every flavour we have checked.
The numbers, side by side
Values are shown as the range across every flavour we have verified (22 Optimum Nutrition Gold Standard 100% Whey flavours, 14 Dymatize ISO100 flavours). Winner is decided on the median flavour.
| Per serving | Optimum Nutrition Gold Standard 100% Whey | Dymatize ISO100 |
|---|---|---|
| Protein per serving | 24g | 25gWinner |
| Calories per serving | 120–130 kcal | 110–120 kcal |
| Protein per 100 kcal | 18.5–20g | 20.8–22.7gWinner |
| Sugar per serving | 1–2g | 1gWinner |
| Fiber per serving | 0–1g | 0–1g |
| Fat per serving | 1.5–2g | 1gWinner |
| Serving size | 30–33g | 30–33g |
| Sugar alcohols | None | None |
| Other sweeteners | Sucralose, Acesulfame potassium (Ace-K) | Sucralose, Stevia |
| Protein sources | Whey Protein Isolate, Whey Protein Concentrate, Hydrolysed Whey | Hydrolysed Whey, Whey Protein Isolate, Peanut Flour |
Ingredients worth noting
Optimum Nutrition Gold Standard 100% Whey
- Artificial Colours: Synthetic dyes.
- Seed Oils: Refined oils high in omega-6 linoleic acid.
- Cellulose Gum: Also called carboxymethylcellulose, a thickener.
- Carrageenan: A seaweed extract used to stop drinks separating.
Dymatize ISO100
- Caffeine: A stimulant, and ingredient lists rarely state the amount.
Where they rank
Optimum Nutrition Gold Standard 100% Whey
- Not currently ranked.
Dymatize ISO100
- #3 of 10 in Lactose Free Protein Powders
- #4 of 10 in Easy to Digest Protein Powders
- #5 of 10 in Best Whey Protein Powders
- #5 of 10 in Leanest Protein Powders
- #5 of 10 in Best Protein Powder for GLP-1 Users
- #5 of 10 in Best Protein Powders for Seniors
- #5 of 10 in Best Protein Powders for Menopause
- #5 of 10 in Protein Powders Without Seed Oils
- #6 of 10 in Best Protein Powders
Frequently asked questions
- Which has more protein per calorie, Optimum Nutrition Gold Standard 100% Whey or Dymatize ISO100?
- Dymatize ISO100, with 20.8g of protein per 100 calories against 20g for Optimum Nutrition Gold Standard 100% Whey (median across all verified flavours).
- Do Optimum Nutrition Gold Standard 100% Whey and Dymatize ISO100 contain sugar alcohols?
- Optimum Nutrition Gold Standard 100% Whey: None. Dymatize ISO100: None. This comes from the verbatim ingredient list of every flavour we have verified.
Every Optimum Nutrition Gold Standard 100% Whey flavour we have verified
Banana Cream24g protein · 130 kcal · 18.5g / 100 kcal
Caramel Macchiato24g protein · 120 kcal · 20g / 100 kcal
Chocolate Coconut24g protein · 130 kcal · 18.5g / 100 kcal
Chocolate Hazelnut24g protein · 130 kcal · 18.5g / 100 kcal
Chocolate Malt24g protein · 130 kcal · 18.5g / 100 kcal
Chocolate Mint24g protein · 130 kcal · 18.5g / 100 kcal
Chocolate Peanut Butter24g protein · 130 kcal · 18.5g / 100 kcal
Cinnamon Roll24g protein · 120 kcal · 20g / 100 kcal
Coffee24g protein · 130 kcal · 18.5g / 100 kcal
Cookies & Cream24g protein · 120 kcal · 20g / 100 kcal
Delicious Strawberry24g protein · 120 kcal · 20g / 100 kcal
Double Rich Chocolate24g protein · 120 kcal · 20g / 100 kcal
Extreme Milk Chocolate24g protein · 120 kcal · 20g / 100 kcal
French Vanilla Creme24g protein · 120 kcal · 20g / 100 kcal
Fruity Cereal24g protein · 120 kcal · 20g / 100 kcal
Iced Café Latte24g protein · 130 kcal · 18.5g / 100 kcal
Mocha Cappuccino24g protein · 130 kcal · 18.5g / 100 kcal
S'Mores24g protein · 130 kcal · 18.5g / 100 kcal
Strawberries & Cream24g protein · 120 kcal · 20g / 100 kcal
Strawberry Banana24g protein · 120 kcal · 20g / 100 kcal
Vanilla Ice Cream24g protein · 120 kcal · 20g / 100 kcal
White Chocolate24g protein · 120 kcal · 20g / 100 kcalEvery Dymatize ISO100 flavour we have verified
Chocolate Peanut Butter25g protein · 120 kcal · 20.8g / 100 kcal
Cocoa Pebbles25g protein · 120 kcal · 20.8g / 100 kcal
Cookies & Cream25g protein · 120 kcal · 20.8g / 100 kcal
Dunkin' Cappuccino25g protein · 120 kcal · 20.8g / 100 kcal
Dunkin' Glazed Donut25g protein · 120 kcal · 20.8g / 100 kcal
Dunkin' Mocha Latte25g protein · 120 kcal · 20.8g / 100 kcal
Fruity Pebbles25g protein · 120 kcal · 20.8g / 100 kcal
Fudge Brownie25g protein · 120 kcal · 20.8g / 100 kcal
Gourmet Chocolate25g protein · 120 kcal · 20.8g / 100 kcal
Gourmet Vanilla25g protein · 110 kcal · 22.7g / 100 kcal
Mint Chocolate Chip25g protein · 120 kcal · 20.8g / 100 kcal
Pebbles Birthday Cake25g protein · 120 kcal · 20.8g / 100 kcal
Salted Caramel25g protein · 110 kcal · 22.7g / 100 kcal
Strawberry25g protein · 110 kcal · 22.7g / 100 kcalAll numbers on this page are transcribed from each manufacturer’s published nutrition label and verified by hand, then compared across every flavour in our database. If you are tracking a daily protein target, the Protein Pal app lets you scan either powder and log it in seconds. See everything from Optimum Nutrition Gold Standard 100% Whey and Dymatize ISO100, or browse all rankings and brands.
