“In Ayurvedic medicine ashwagandha is known as a ‘rasayana’, which is a medicine used to enhance physical performance and re-vitalise the mind,” says Professor Jerome Sarris from the National Institute of Complementary Medicine (NICM) in Australia. Some studies suggest that ashwagandha may help ease stress and anxiety. Image: IndiaPictures / Contributor / Getty Images IndiaPicturesThere is also early evidence that ashwagandha may improve sleep. There have been very rare reports of liver issues from some ashwagandha supplements, says Sarris, but the identity or quality of the ashwagandha that triggered those cases is unknown. And if stress or sleep problems are serious or getting worse, see a healthcare provider first, he says.