Numerous studies have been done showing the benefits of green tea on your skin.
Animal studies have shown protection from skin cancer. Studies on both animals and humans have demonstrated that topical green tea formulations reduce sun damage. It appears to exert sun damage protection by quenching free radicals and reducing inflammation rather than by blocking UV rays. Green tea may synergistically enhance sun protection when used IN ADDITION to sunscreen.
HELPS PREVENT WRINKLES AND OTHER SIGNS OF AGING
A study done in 2005 divided 40 women into two groups. One group used a combination of 10% green tea cream and a 300 mg green tea oral supplement twice daily. The second group received a placebo. At the end of the 8 week study, no significant differences were found between the green tea treated and the placebo groups, however, histologic grading of skin biopsies did show a significant improvement in the elastic tissue content of treated specimens. There is preliminary evidence that green tea may inhibit the enzymes whose excessive activity contributes to age-related degradation of the skin. In a 2009 study, green tea was shown to inhibit both collagenase and elastase.
The sun protection benefits of green tea are well documented and it would make sense to apply a green tea formula under your sunscreen when going out into the sun. It may be best to use a zinc oxide sunscreen because zinc oxide is chemically inert and will not react with the green tea as some chemical sunscreens might do, especially in sunlight.
If you are dealing with the redness and irritation that comes with Psoriasis, applying green tea topically may bring some relief. Research has shown that green tea can help to slow down the production of excess skin cells that seems to be the underlying cause of this and similar conditions.
Studies have also shown that using a topical cream with green tea can help reduce the redness from rosacea. This is most likely due to the calming effect green tea has, as well as the antioxidants working on the problem.