Optimum Nutrition
1 product scored by Formulate's ingredient-level rubric. Brand grade reflects a weighted average across the full lineup.
Scored by the Formulate Research Team · Last reviewed May 2026
What Optimum Nutrition makes
- 1 Protein
Top-scoring products
Optimum Nutrition: frequently asked questions
How does Formulate grade Optimum Nutrition?
Formulate grades Optimum Nutrition by aggregating the ingredient-level scores of all 1 Optimum Nutrition product it has analyzed — weighing dose accuracy, ingredient form, transparency, and third-party testing. Optimum Nutrition's overall brand grade is A- (92/100). It is not a paid or sponsored ranking.
What is Optimum Nutrition's best supplement?
GOLD STANDARD 100% Casein is Optimum Nutrition's highest-scoring product on Formulate at 93/100 (grade A).
What does Optimum Nutrition make?
Formulate has scored 1 Optimum Nutrition product, including 1 Protein.
About the grading
Every Optimum Nutrition product above is scored on dose accuracy, ingredient form, certifications, transparency, and third-party testing. The brand grade aggregates those product scores — it isn't a marketing claim or a pay-for-play ranking. See the methodology page for the full rubric.