I have been a vegetarian for 30 years and a vegan for 20. I'm a type O and have never had any problems with energy or health. My doctor always gives me a clean bill of health at every checkup. I have never had any major health issues. My cholestoral count is absolutely perfect. If anything, my doctor wants me to exercise more to keep things flowing. I'm 56 years old, with good health, normal weight and good daily energy. The only supplements that I take are Vitamin C, ginsing, garlic and flax seed oil.