Funny, but maybe not so much. I had an acquaintance in the 80s who was a strict fruitarian; although, he didn't use that term. Very fit and an excellent martial arts instructor. His diet was "healthy" fruit washed down with large amounts of orange juice. Yeah, he was "healthy" until he was rushed to the hospital due to severe hypoglycemia. He was lucky, but I'm not sure he continued his fruitarian ways after that.