Your ProEnergy protein powder is the BOMB, both positively and also negatively being that it does help to produce muscle mass but after using this product for at least two years or so of studying the effects on my body it is clear that bloating and constipation are significant side effects of this particular product for me. I am somewhat lactose intolerant but began using this product because of that reason. When I began using this product I was aware that bloating was evident also some degree of constipation but I did not Associate these discomforts with the usage of pro energy until I started to closely give it my thorough attention. I do love the taste of these shakes and they are proven to actually work but the price of the bloating and constipation... hard to swallow.