Most adults can safely consume up to 400 milligrams (mg) of caffeine per day. Many pre-workout supplements contain 250–400 mg ...

Research shows that there's an optimal amount of caffeine you can consume to enhance your performance. Too much will have a negative effect.

Orange juice is a source of antioxidants that might afford in vivo protection from oxidative stress. To test this hypothesis, we carried out a human intervention study with blood orange juice ...