This is number 13 in our 13-day "health benefits of drinking coffee" series. 13. Coffee is The Biggest Source of Antioxidants in The Western Diet For people who eat a standard Western diet, coffee may actually be the healthiest aspect of the diet. That’s because coffee contains a massive amount of antioxidants. In fact, studies show that most people get more antioxidants from coffee than both fruits and vegetables… combined (56, 57, 58). Coffee is one of the healthiest beverages on the planet. Period.