my husband is 72, diabetic and nowgoing on 2 full months of chronic diarrhea. the dr.s cannot figure out why. he has had blood work upper GI, coloncopy and everything thing comes back normal, he has lost 23 pounds, he is hungry all the time, he goes to the bathroom at leawr 9 to 10 tines a day. he is light headed and weak. what is the problem?? pleaae help lynngriffin