I myself am attempting to lower the amounts of, gluten, wheat and sugars in my diet in an attempt to regain some of the energy I had in being a younger man. And it does appear I’m making marginal success, although fresh vegetables and fruits are abundant where I live in the summer and are priced much lower. I have found that as the body ages it is more important to be observant about what we put in it. Although in many ways I was more health conscious as a younger person. Perhaps 🤔 it was because I was more disciplined as mccoy pointed out about his life, when he was younger. However, at the same time I think I may have gone overboard in my attitude about discipline and cramped my social life. For what ever worth that may have had on my balance in being happy, and doing the most appropriate things to enhance a spiritual life, and in my interaction with friends.
Steve, most probably the energy as a younger man cannot be completely retrieved late in life, not even with the best dietary regimen. My diet has never been objectively better than today, but I certainly have not the energy I had until 15 years ago. Perhaps some targeted supplements may do, I am going to experiment for example with NMN and some other molecules.
In a very few words the best diet appears to be, according to the main nutritional authorities, a Mediterranean diet in all its variations. It is what the SRF lessons suggest. The backbone of it is vegetables, fruit, nuts and seeds, whole grain cereals, legumes, some animal protein (dairy mostly) , for those who don't have ethical issues fish or a little white meat.
As a young man I had a very strong willpower, but less discrimination. I wish I had both back then, I would have been formidable. But I do not complain, willpower as a whole has served me well, and discrimination was sufficient, due mainly to the Mentoring of the SRF masters.