The extract of the leaves of a perennial evergreen shrub native to Asia, this ingredient has a long history of therapeutic use, dating back to China approximately 5,000 years ago. Green tea extract is a rich source of anti-oxidants, such as vitamins C and E and is valued for its stimulating, anti-inflammatory and free radical scavenging (anti-oxidant) activity. Green tea extract is said to help repair the effects of aging and environmental factors on skin. It is also believed to help rejuvenate skin, prevent sun damage and promote elasticity. When used in hair care products, green tea extract tones and protects the scalp. This extract is also often found in energizing or revitalizing spa products.