Optimum Nutrition

Optimum Nutrition receives a brand trust score of 0/100 in GoodSupp's independent analysis. The company was founded in 1986 and is headquartered in Downers Grove, IL, United States. They hold 9 verified certifications including Consumerlab, Informed Sport, Labdoor, Nsf Certified For Sport, Usda Organic. These certifications are independently verified by GoodSupp and indicate the brand meets recognized quality, purity, and manufacturing standards. Note: Optimum Nutrition has 5 historical regulatory incidents on record. These are factored into the overall trust score and are detailed in the violation history section above.

Yes. Optimum Nutrition holds 9 verified third-party certifications: Consumerlab, Informed Sport, Labdoor, Nsf Certified For Sport, Usda Organic. Third-party testing means an independent laboratory — not the supplement company itself — has verified the product's contents, purity, and/or manufacturing practices. This is one of the strongest indicators of supplement quality because it removes the conflict of interest inherent in self-testing. Not all certifications are equal: NSF International and USP are considered the gold standard, while GMP certification indicates proper manufacturing practices.

Based on GoodSupp's quality analysis, the highest-rated Optimum Nutrition supplements are: Glutamine Powder, Unflavored, 10.58 oz (300 g) (score: 100/100); Glutamine Powder, Unflavored, 2.2 lbs (1 kg) (score: 100/100); Micronized Creatine Powder, Unflavored, 10.58 oz (300 g) (score: 100/100). These scores are calculated from ingredient quality, dosage adequacy, bioavailability, label transparency, and inactive ingredient safety. Scores can vary significantly across a brand's product line — a high brand trust score doesn't guarantee every individual product is top-quality.

Optimum Nutrition is headquartered in Downers Grove, IL, United States. The company was founded in 1986. They currently offer 95 products in their supplement lineup. Their official website is optimumnutrition.com. Manufacturing location may differ from corporate headquarters — look for GMP certification to verify manufacturing quality standards.