Oat Straw (Avena sativa)Parts used: Stem Properties Alterative, demulcent, nervine, nutritive, vulnerary Primary nutrients Calcium, phosphorus, silicon, vitamins A, B1, B2 and E Oat straw is rich in silica, which is found in the nervous system. The brain and nerves need silica. Oat straw tea is often used to calm the nerves and relieve insomnia and depression. Oat straw can help strengthen a weak nervous system. It is very relaxing to the body and can help with aches and