If you want probiotics just buy the cultured yogurt at the health food store and use a bulk milk Ioslate. Propeptide retails for $41.99 but I've seen it discounted to $29.00 for two pounds. A milk isolate will set you back about $12.00 for two pounds and a large container of cultured yogurt with live active probiotics is under $4.00. Honestly, commercial protein powders are a waste. You're paying a premiium to a middle man marketing machine.