In case you were feeling like your green tea wasn't already healthy enough, scientists have found a way to make the wonder juice even healthier. According to research, adding citrus juices to green tea may increase catechins — antioxidants believe to be responsible for green tea's health benefits— levels by more than five times, while vitamin C boosted absorbable levels of catechins by up to 13 times. So moral of the story? Think about squeezing a little lemon into your green tea tomorrow. Not only will it add a little extra flavor to your tea, but you'll be boosting its antioxidant power as well.