Can't you just eat a healthy, balanced, clean diet, like humans have done for eons?
My parents' families were southern farmers. Everything they ate was deep-fat fried, smothered in gravy, and served with a side of collards (with pepper sauce, of course!).
And they all dropped dead like flies! In their late 80s and 90s.
But of course, their diets weren't full of artificial colors, flavors, preservatives, emulsifiers, etc. Just as importantly, they were active and doing physical labor. My great uncle literally worked his farm up to the day he died just a few weeks shy of 92.