The results are in, the clinical trials have spoken. Drinking relieves stress--drinking green tea, that is. There's something in green tea that helps us relax. And it may start turning up in other foods soon.

The legendary benefits of green tea--weight loss, cancer prevention, immune system boosting, and more--have put green tea on everyone's top ten superfoods list. Now the teacup's relaxation effect has been proven in the lab.

An amino acid called theanine (or L-theanine) is responsible for green tea's magic. First discovered in 1949, theanine is found almost exclusively in tea leaves. (It's also found in one type of mushroom--but who wants to relax with a plate of mushrooms?)

Clinical trials testing the relaxation effect of theanine produced remarkable results. Japanese researchers found that human volunteers became more relaxed about 30-40 minutes after taking up to 200mg of theanine. That's six cups of tea to you and me.

Once the theanine is flowing, a couple of things happen. Your brain waves start to shift into the alpha range. That's a good thing. Alpha brain waves occur when you are relaxed and peaceful, but still awake--like after a massage or a hot bath, or during meditation.