Several

"Several conditions are linked to a diet high in animal products, and many are trying to avoid them by going meatless. There are also conditions for which doctors will advise staying away from meat, including irritable bowel syndrome, poor digestive capacity, other colon-related conditions, stroke, heart disease, high cholesterol, gout, arthritis, osteoporosis, obesity, acne, kidney disease, and liver disease."
--Frankie Avalon Wolfe, M.H.H., Ph. D., R.N.C.P.