I take Vitamin C, Vitamin D and fish oil tablets, plus a Hair, Nails and Skin supplement. At the moment - and I hope it continues that way - I do not need any prescribed medication. We have freshly squeezed orange every morning and have done so for many years.
I think having a walk each day - preferably a bit longer some days, is one way of keeping a bit fitter, physically and mentally.
Experiencednotold
Your post re your great uncle chimed with me. My granddad smoked at least 20 Woodbines a day from the age of 13 until he was around 90. He seemed to survive on a diet of bread and cheese and Ovaltine. He died at the age of 97. His son, on the other hand, never smoked, was very careful about his health (especially his teeth - he had all of them when he died, bar one) and also lived to 97. It seems to suggest that genetic background is quite important.