9. Coffee
“It makes me shake my head when I hear people say they’re trying to quit coffee,” says Talbott. Sure, too much of it isn’t good for you, but at the right dose, coffee does have real benefits. “Caffeine is the most-researched performance product on the planet, and it has the same [beneficial] flavonoid content as tea.” Plus, there’s research showing regular coffee drinkers may have a lower risk for dementia, diabetes, and maybe even Parkinson’s.