About Optimum Nutrition
Optimum Nutrition is the global standard for performance nutrition, founded in 1986 by two brothers with a passion for performance. Based in Downers Grove, Illinois, the brand became Glanbia's first billion-dollar brand, generating over $1 billion in retail value. Glanbia acquired Optimum Nutrition in 2008 for €213 million, having previously supplied whey for their products. Gold Standard 100% Whey is the world's best-selling protein powder, featuring whey protein isolate as the primary ingredient with 24g of high-quality, fast-absorbing protein per serving. The award-winning formula contains naturally occurring BCAAs and glutamine, is low in sugar and fat, and is Informed Choice certified for banned substance testing. Optimum Nutrition created the slowly digesting protein category with Gold Standard 100% Casein, providing 24g protein per serving for prolonged amino acid release overnight to support muscle growth while sleeping. They also created the anytime energy category, now dominated by Essential Amino Energy. Gold Standard 100% Isolate delivers 83% pure protein per serving through advanced filtration, with 25g whey protein isolate, 5.5g naturally occurring BCAAs, and 4.3g glutamine per serving - ultra-low in sugar (0.3g or less) and fat (0.4g or less). The Gold Standard BCAA Train + Sustain range offers 5g BCAAs in a 2:1:1 ratio plus Vitamin C and zinc for immunity support, designed for extended workouts with light, refreshing flavours. Additional products include Gold Standard Pre-Workout, Creatine Powder, HMB, Glutamine supplements, and protein bars including the Optimum Protein Bar and Protein Crisp Bar. Compare Optimum Nutrition supplement prices across UK retailers including Amazon, Holland & Barrett, and specialist supplement stores with Grocefully to find the best deals.



















