Medically reviewed by Kristie Reed, PharmD Key Takeaways Green tea extract and caffeine together can boost focus and mental ...

Caffeine offers some real health benefits—but not if you go overboard. Here’s how coffee, energy drinks, and other caffeine products can affect your health.

One of the most common ingredients in sports supplements is caffeine. In moderate amounts, caffeine can boost performance in some sports, depending on the individual athlete. But too much caffeine can ...

Dietary supplements are products like vitamins, minerals, and herbs that claim to promote wellness. Many of these supplements do have known benefits, but there are also risks you should know about.