This product is from the category of those that do not know exactly, but you drink and praise yourself, well what I done, I rejuvenate and take care of themselves. I finish the first bank (took action on two at once), neither positive nor negative effects were observed. I am glad that the taste is not so disgusting, such as collagen powder - sour is something that is easily consumed, it does not leave an unpleasant aftertaste. Drink up in the hope that the upcoming retirement in fear he will flee from me))