Casein comparison
Optimum Nutrition Gold Standard 100% Casein vs Dymatize Elite Casein
Dymatize Elite Casein scores higher on our standard, 74/100 to 63/100. It earns more points for third-party testing (Informed Choice vs none found) and ingredient simplicity (natural flavors vs mixed natural and artificial), while ON Gold Standard Casein earns more for protein density (71% vs 69% 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.
Optimum Nutrition
Gold Standard 100% Casein
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 | ON Gold Standard Casein | Dymatize Elite Casein |
|---|---|---|
| Our score | 63/100 | 74/100 (better) |
| Protein density | 22 / 30 (better)71% of each scoop is protein | 14 / 3069% of each scoop is protein |
| Third-party testing | 0 / 25No verified independent testing program | 15 / 25 (better)Independently tested for contaminants or label accuracy |
| Label transparency | 20 / 20Fully disclosed formula, no amino spiking | 20 / 20Fully disclosed formula, no amino spiking |
| Sugar | 10 / 101 g sugar per serving | 10 / 100 g sugar per serving |
| Ingredient simplicity | 6 / 10Mix of natural and artificial flavors or sweeteners | 10 / 10 (better)Natural flavors and sweeteners |
| Verified label data | 5 / 57 of 7 label values verified | 5 / 57 of 7 label values verified |
| Type | Casein | Casein |
| Protein per serving | 24 g | 25 g |
| Serving size | 34g (About 1 Scoop) | 2 scoops (36 g) |
| Protein by weight | 71% (better) | 69% |
| Sugar | 1 g | 0 g (better) |
| Calories | 120 | 130 |
| Cost per 25 g protein | Not verified | Not verified |
| Price per serving | Not verified | Not verified |
| Third-party certifications | None found | Informed Choice |
| Sweeteners | Acesulfame Potassium, Sucralose | Sucralose, Acesulfame Potassium |
| Allergens | Milk, Soy | 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 ON Gold Standard Casein if…
On the label facts we track, ON Gold Standard Casein has no clear edge over Dymatize Elite Casein. Taste, how it mixes and the price where you shop may still decide it.
Choose Dymatize Elite Casein if…
- You want independent testing for contaminants or label accuracy (Informed Choice); we found no third-party testing for ON Gold Standard Casein.
- You want less sugar (0 g vs 1 g per serving).
- You prefer natural flavors and sweeteners (ON Gold Standard Casein uses a mix of natural and artificial ones).
- You want a powder the brand labels gluten-free (our record for ON Gold Standard Casein has no such label).
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.