Optimum Nutrition's Gold Standard 100% Whey is the world’s best selling whey protein powder. Optimum Nutrition is the supplement brand of choice for leading teams and athletes including European Cup Champions Leinster. Gold Standard 100% Whey delivers 24g of the purest muscle building protein per serving, with only 120 kcals and 1g of fat. It should be used post-workout to support lean muscle development, recovery and maximise the results of your workout. It mixes well with water and tastes of strawberry.