The issue is what is your personal cut off point for causing harm, and to what.
"It's virtually impossible to get all the nutrients you need," says Gaynor Bussell, a spokesman for the British Dietetic Association. "You would miss out on essential fatty acids. One of the big ones is B12, and you can get anaemia if you don't get enough. And deficiencies in calcium, protein and iron would lead to tiredness and lethargy. You would be prone to osteoporosis. The immune function would probably be quite low. We have to have things from all the different food groups for a reason."
I would also wonder what eating all that fruit would do to your teeth.
Is you son still Frutarian?My son, 20, eats mainly fruit, for complicated reasons. He is an ethical vegan, his own decision from childhood. He feels fruit is a natural and healthy food for humans, so that is what he eats most of. He also feels there is less death of insects and other wildlife from fruit growing and harvesting, and he cares about that a lot, too.
I don't think Son would say fruitarianism is "more" ethical than regular veganism, but he would say it feels right for him. And then flex a bicep at you.
I do get a kick out when someone digs up an old thread.Is you son still Frutarian?