Thanks. Yes we are complicated and all somewhat different. I experiment on myself a lot and I take a lot of clues from evolution, some evolutionary arguments are very convincing. Gluten alone didn't make much difference in my case, but cutting out coffee+milk+wheat for 2 weeks did fix my IBS for a while (until I started cheating)... it took almost 2 weeks for the result to occur which is probably why it has been so hard in the past to test foods (I didn't know I had to wait so long). HIIT is great. I climb hills as fast as I can, forcing myself to over-breathe makes it easier. My current keto diet is not a short-term change, it is a short-term experiment. I will evaluate what to take from it after I'm done experimenting.