Green tea is an amazing elixir. You might be able to reap even more health benefits from your cup of tea by adding lemon, according to a few studies. Catechins, the main health compound in tea tied to reduced risk of cancer, heart attack, and other diseases, unfortunately isn't absorbed very well in the intestines. After digestion, less than 20 percent of catechins remain. In two studies, however, Purdue University researchers found that adding lemon juice, other citrus juice, or vitamin C helped the body absorb as much as 13 times the healthy catechins than normal.
Between all the coffee and water I drink a day (and COUGH... beer, scotch, bourbon... COUGH), I doubt I could get one more ounce of fluid in me. Interesting nonetheless.