Stomache and gas, bloating, mild constipation?

a friend of mine, who is a male- has insulin resistant diabetis, stage 1 hypertension, vertigo, anxiety, and the diabetic doc wants him to loose a percentage of his body weight , to aid in reducing his risk for heart disease, oh yeah, he also has sleep apnea,( uses a c- pap) he eats organic foods, low sodium foods, fresh foods, vegetables, drinks almond and rice milk, takes protein sources ontop of the protein he intakes with a lot of the foods he eats, we kinda cut back on much of the fiber, since this PROBLEM; stomache bloating, cramping that mocks the signs of a stroke, inconsistent bowel movements that vary in amounts and textures, we have some ideas, like intaking too much oxygen, gasteoparesis, etc, but we are searching for releif, he needs to be able to expell more frequently, his bodily gas, wehter its in the form of a fart, or a belch- I dont know if it matters... Any advice?any will be appreciated, even if the advice is typical, or severely medically out there, any advice at all is appreciated, as we are in dire straits as far as his discomfort and his persistance in getting well. thanks in advance!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!…