I just finished a round (bottle) of them as they were recommended to me by my NP as a means to see if I could stand for longer than 2 minutes. Sadly they did not deliver. Not only did the powder taste awful, but at first it gave me diarreah, then severe constipation and I felt generally sick. Theres my 2 cents. As you know, what works for one person, doesn't for another. Good luck!