Thanks Jackie for your reply about taking lots and lots of different kinds of vitamins and supplements. I do read about the subject a lot.
Years ago I read a Life Extension article about how older fireflies put in with younger fireflies lived longer healthier and better lives[from memory]. I would love to find the original research.
At a personal level I can understand why it works in human beings.
I go to a nearby gym which is largely young women[they are all young to me]. I'm not interested in walking but when nice young lady says ''Alex lets go fast walking and talking around the oval ''I agree. When another young friend says lets go to see Midnight in Paris by Woody Allen or the Mesopotamian exhibition[neither of which I had considered] I say yes to her.
I fly a light plane regularly and have flying friends who I also see socially. The oldies in this group are half my age
Our attitudes and behaviour are largely governed by the people around us. To a large extent we choose the people around us in one way or another
Alex