Supplements like creatine should have a third ... third-party certifications can help ensure safety, quality and purity.

All Optimum Nutrition supplements are tested in-house for banned ... than other supplements not tested by an independent lab for purity and potency isn’t certified safe for sport, so may not ...

Furthermore, it’s third-party tested and certified by Informed Choice, an organization that evaluates the safety and purity of supplements. Read more information on the brand in our full ...