Supplement Cert Directory

Optimum Nutrition

Is Optimum Nutrition third-party tested?

Yes — as of 2026-09-21, Optimum Nutrition holds 10 third-party certifications across 2 independent testing programs: Informed Sport / Informed Choice, Labdoor. Every certification below links to the certifying body's official listing so you can verify it at the source.

Registries checked (as of 2026-09-21): Informed (Products are tested for banned substances by a WADA-accredited laboratory; the Sport program targets competitive athletes and the Choice program targets general consumers.) · NSF · USP · Labdoor (Products are independently laboratory-tested for purity and potency and assigned a letter grade.) · BSCG

Certified categories: amino acids, creatine, energy, pre-workout, protein

Last verified: 2026-09-21

SupplementSentry found certifications on 10 of Optimum Nutrition's products in our index.

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Certification breakdown