Whey and whey isolate comparison
Myprotein Impact Whey Isolate vs Dymatize ISO100 Hydrolyzed
Myprotein Impact Isolate scores higher on our standard, 86/100 to 63/100. It earns more points for third-party testing (Informed Choice and Informed Protein vs none found) and protein density (86% vs 78% protein by weight).
Both are scored out of 100 against our published standard: protein density, third-party testing, label transparency, sugar, ingredient simplicity and verified label data. Every number below is from the manufacturer's label; last checked 2026-10-13.
Myprotein
Impact Whey Isolate
Side by side
Per serving, from each label. Bold marks the better score, protein density, sugar and cost where the two differ. How we score
| Compared | Myprotein Impact Isolate | Dymatize ISO100 |
|---|---|---|
| Our score | 86/100 (better) | 63/100 |
| Protein density | 30 / 30 (better)86% of each scoop is protein | 22 / 3078% of each scoop is protein |
| Third-party testing | 15 / 25 (better)Independently tested for contaminants or label accuracy | 0 / 25No verified independent testing program |
| Label transparency | 20 / 20Fully disclosed formula, no amino spiking | 20 / 20Fully disclosed formula, no amino spiking |
| Sugar | 10 / 100 g sugar per serving | 10 / 101 g sugar per serving |
| Ingredient simplicity | 6 / 10Mix of natural and artificial flavors or sweeteners | 6 / 10Mix of natural and artificial flavors or sweeteners |
| Verified label data | 5 / 57 of 7 label values verified | 5 / 57 of 7 label values verified |
| Type | Whey Isolate | Whey Isolate |
| Protein per serving | 25 g | 25 g |
| Serving size | 1 scoop (29 g) | 1 scoop (32g) |
| Protein by weight | 86% (better) | 78% |
| Sugar | 0 g (better) | 1 g |
| Calories | 110 | 120 |
| Cost per 25 g protein | Not verified | Not verified |
| Price per serving | Not verified | Not verified |
| Third-party certifications | Informed Choice, Informed Protein | None found |
| Sweeteners | Sucralose, Acesulfame Potassium, Stevia Leaf Extract, Sugar | Sucralose, Steviol Glycosides |
| Allergens | Milk | Milk, Soy |
| Proprietary blend | No | No |
| Added free amino acids (amino spiking) | No | No |
| Last checked | 2026-10-13 | 2026-10-13 |
Which to choose
Only the differences in our records. A value we couldn't verify never counts as a difference.
Choose Myprotein Impact Isolate if…
- You want independent testing for contaminants or label accuracy (Informed Choice and Informed Protein); we found no third-party testing for Dymatize ISO100.
- You want more of each scoop to be protein (86% vs 78% by weight).
- You want less sugar (0 g vs 1 g per serving).
- You avoid soy: Dymatize ISO100's label lists it as an allergen and Myprotein Impact Isolate's does not.
Choose Dymatize ISO100 if…
On the label facts we track, Dymatize ISO100 has no clear edge over Myprotein Impact Isolate. Taste, how it mixes and the price where you shop may still decide it.
The two powders
Good to know
Labels and prices change, so check the package before buying, especially if you have allergies. If you are pregnant, nursing, buying for a child or managing a health condition, ask your doctor before adding a supplement.