Hey all, The question: Does whey protein cause a reaction for anyone with mast cell issues or histamine intolerance? I was diagnosed with MCAS a couple years ago, but the doctor was not helpful in teaching me how to understand my symptoms. I seem to react to almost all foods, so I kept searching for causes to my symptoms. In the end, I always seem to circle back to MCAS. All of that said, I recently started an elemental diet to "reset" my body. There is a product called Absorb Plus that I used, and I seemed to do well at first. However, my body eventually started reacting (bloating, constipation, fatigue, foggy-headed). This product doesn't have fat, but it does use a very high grade Whey Protein Isolate. What do you think? Would you consider this protein safe for someone with MCAS? Thanks!