>>21656280 (OP)
Dude, I was 50+ and got established with a cardiologist. Got heart cath, carotid ultrasound, ekg, echo, and full workup including a stick on 10 day heart monitoring recording me 24/7. I have zero plaque in my arteries, no arrthymias and low bP. Nothing wrong except high triglycerides.
Diet and exercise is part of a bigger picture, part of which is your genetic makeup and family history/propensity to get diabetes and other crap. Knowledge of what is best for each age group has me on Atorvastatin just because I was told to do it. Pfft. Everyone in my family into their 90s took it before me too. Who cares? Just do what has the most studies for longevity.
In the meantime, enjoy your life when your numbers are good, and to me that means eating what you want at least some of the time. I gained 10lbs on summer vacation time, and don't care that my cardiologist managed to go to Italy for 30 days without weight gain. This just means he has no idea how to travel and dine well. Amateur!