Optimum Nutrition
Optimum Nutrition (ON) is a sports nutrition brand owned by Glanbia Performance Nutrition, widely sold through specialty retailers and e-commerce.
Last updated: 2026-06-26 · Last reviewed: 2026-06-26
Website: https://www.optimumnutrition.com
Categories covered: creatine
Testing notes: ON support documentation lists Micronized Creatine Powder among Informed Choice certified products. Batch-level verification is available through the Informed Choice product search.
Transparency notes: ON states that ingredients are tested for purity and potency and that Micronized Creatine Powder participates in the Informed Choice banned-substance testing program.
Product reviews
Sources
- ON Support — Are your products Informed Choice certified? — Optimum Nutrition (certification_body)
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