How Guys Over 40 Get And Stay Ripped

Once you hit 40 are you doomed to increasingly difficult gains, more belly fat, less testosterone and just not feeling good? Why is it that everyone says “once I hit 40 it got hard to lose weight”?
When I was 19 I remember reading a bodybuilding magazine supplement ad for a testosterone booster. It showed some “study” that suggested once you hit 21 years of age, that your testosterone naturally…