Ashwagandha root (Withania somnifera). Ashwagandha is used in Ayurvedic (Traditional Indian) medicine as a general tonic to help support the immune system and as a mental health aid. Research has shown that it contains anti-oxidants and also that it helps with receptor capacity in the brain; seeming to aid memory. In herbal medicine it is used as a health strengthener or adaptogen; to help the body to stay health and boost energy. It is toxic if eaten and is usually given as a sweetened milk decoction.