I do my best! Just make sure you're not tinkering too much with your molecules, and you should be fine. Things like smoking, drinking, unnecessary hormones or supplements beyond reasonable amounts (ask your doctor if you're unsure), chronic inflammation and poor diet can really do a number on a molecular level - so drink water, eat fresh balanced nutrition from varied sources, get plenty of fiber (you wanna keep your gut flora happy if you want everything else to be happy!) and stay low on inflammation-inducing foods, and your DNA will thank you.

Oh, side note! Pay attention to your stress levels. I'm not talking physical workout stress, I mean brain and trauma type stress. High chronic levels of cortisol can really do a number on your telomeres!