Optimum Nutrition Gold Standard 100% Casein is a slow digesting protein powder that provides 24 grams of protein per serving. In addition to 24 grams of casein protein, this product has almost 5 grams of BCAAs and 40% of your daily value for calcium. Optimum Nutrition recommends using this product between meals and before bed for muscle recovery. To use, mix a scoop of the powder into 8–14 ounces of cold water or milk. For best results, use 30–60 minutes after a workout or before bed.
Customer reviews for Gold Standard 100% Casein are very positive. Customers shared that it was easy to mix and drink and had great flavor. Most reviewers recommended using milk instead of water but that both taste good.