Head to head · Protein Powder
Dymatize ISO100 Hydrolyzed Whey Protein Isolate vs Momentous Grass-Fed Whey Protein Isolate
Dymatize scores higher overall (8.7 vs 7.9 out of 10), mainly on efficacy, value, experience and transparency. Momentous still leads on quality & purity.
Updated September 2026 from our full reviews · How we score
An all-isolate whey with a hydrolyzed fraction: 25 g protein and about 2.7 g leucine per 120-calorie scoop, with Informed Choice testing.
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A premium grass-fed whey isolate with 20 g of protein per 90-calorie scoop, NSF Certified for Sport status and a short, gum-free ingredient list.
We may earn a commission when you buy through these links — it never affects our scores. How we make money
We may earn a commission when you buy through these links — it never affects our scores. How we make money
The short answer
Choose Dymatize if…
- Lifters who want a low-carb, low-fat isolate
- People with mild lactose sensitivity
- Drug-tested athletes
- Calorie-conscious dieters
- You care most about efficacy, value, experience, transparency
Choose Momentous if…
- Drug-tested and professional athletes
- Minimalist ingredient lists without gums or artificial sweeteners
- People with sensitive digestion
- You care most about quality & purity
Side by side
| ISO100 Hydrolyzed Whey Protein Isolate | Grass-Fed Whey Protein Isolate | |
|---|---|---|
| Our score | 8.7 / 10 | 7.9 / 10 |
| Efficacy (30%) | 9.0 | 8.3 |
| Quality & Purity (25%) | 9.0 | 9.5 |
| Value (20%) | 8.0 | 6.2 |
| Experience (15%) | 8.9 | 8.0 |
| Transparency (10%) | 8.5 | 6.0 |
| Form | Powder | Powder |
| Serving | 1 scoop (32 g)71 servings per container | 1 scoop (25 g, Vanilla)25 servings per container |
| Price per serving | See retailer | $2.40 |
| Testing & certifications | Informed Choice | NSF Certified for Sport |
| Dietary | Gluten-free | Gluten-free, Non-GMO |
| Key ingredients |
|
|
| Flavors | 8 (Gourmet Chocolate, Gourmet Vanilla, Fruity Pebbles…) | 8 (Vanilla, Chocolate, Unflavored…) |
| Creator video reviews | 5 | 5 |
Pros and cons
ISO100 Hydrolyzed Whey Protein Isolate
- 25 g of protein and about 2.7 g of leucine per 120-calorie scoop, all from whey isolate
- Informed Choice banned-substance mark on the label
- Only 2 g of carbohydrate and 1 g of sugar in Gourmet Chocolate
- Dymatize publishes a full amino acid profile for the flavor
- buyers frequently praise fast, clump-free mixing
- About $1.55 per serving for the 5 lb tub, pricier than whey blends
- Contains soy lecithin and is sweetened with sucralose (plus stevia in the current formula)
- Some buyers still report bloating despite the isolate base
- Evidence for a real-world benefit from hydrolysis is thin, so part of the premium is marketing
Grass-Fed Whey Protein Isolate
- NSF Certified for Sport, with lot-level testing and published certificates of analysis
- Grass-fed European whey isolate with no gums, fillers or artificial sweeteners
- Only 90 calories per 20 g protein serving
- Unflavored version contains just whey isolate and enzymes
- About $2.40 per serving (roughly 12 cents per gram of protein) before subscription discounts
- 20 g of protein per scoop is lower than most competitors
- buyer reviews are split on taste, mixability and a recent reformulation
- ProHydrolase is labeled as a proprietary enzyme blend, and its benefit is not well established
Our verdicts
ISO100 Hydrolyzed Whey Protein Isolate
ISO100 is one of the most complete whey isolates you can buy: 25 g of protein per scoop with a published amino acid profile, minimal carbs and fat, and banned-substance certification. You pay a premium over whey blends, and the hydrolyzed angle is more marketing than proven performance edge, but for a lean, well-tested isolate that mixes easily it is a safe pick.
Full review
Grass-Fed Whey Protein Isolate
Momentous whey is a top pick for athletes who need certainty: NSF Certified for Sport status, lot-by-lot testing and a minimalist, gum-free formula built on grass-fed isolate. You pay heavily for that assurance and get only 20 g of protein per scoop, so value-focused lifters will find better deals elsewhere.
Full review
What creators say
Questions people ask
Is Dymatize better than Momentous?
Are Dymatize and Momentous third-party tested?
Who should choose Dymatize over Momentous?
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