I believe it.
I a 64…. On Zero meds and run circles around guys half my age.
I'm no gym rat - haven't been in a gym for decades. But I do spend a lot of time outdoors and try to walk at least five miles a day.
I do eat very well, I source my eggs and produce at local farms when I can, pay extra for the better cuts of meat. I eat salmon or sardines daily. Almost no junk food whatsoever. Vitamin D and zinc supplements.
I also ensure I average 7 hours of sleep a night and it's good sleep too. Good sleeping habits are very important.
Also, I watch virtually zero TV. We only have one in the house (none in bedroom - ever) and it's rarely on. I know people that have televisions in every room and they are always on. I believe that television produces a very toxic environment at home. I like a lot of natural light in the home, we have no window treatments and only have lights turned on at night - usually dimmed or just a reading light. Windows are kept open as much as possible in the warmer months and we listen to the birds and crickets, etc.
When I was growing up, you were considered an old man when you hit your 60s and most people of that age looked it. We are very fortunate to live in an age like this where we have such access to high quality foods and medical care.
Tom Brady is an extreme example of the above. He has a pretty incredible diet and exercise regimen - maintained even in the off season. Though I don't pay attention to NFL football anymore, I wish him well and barring injury, I think he's got a shot to be still playing at 50.