I have ordered 2 products one Whey Protein Isolate and Casein Protein Powder. No problems with the Isolate but I've noticed the Casein leaving bits. After being relatively new to these kinds of products I didnt know what was good or bad. It was only after reading these reviews I have noticed the quality must be lacking as I too have had bloating/stomach cramps. I have recently ordered the Whey Protein Isolate but after this batch is gone I will be switching and I suggest you do the same as anyone who knows anything about Matrix products will label them "bottom of the barrell".