get yourself some digestive enzymes, take three with each meal, I garantee you won't have even one fart with those. I used to drink ABB XXL weightgainer 1100 ( 1100 calories in a 20 oz bottle ), it would have me on the toilet the rest of night with explosive diarea. A bodybuilder told me about them, so I took three with my Drink and not even a single fart, my body digested it like a champ. Highly recommend!