Ayurveda, the most ancient of the medical sciences, has used ashwagandha as a regenerative tonic to treat a variety of conditions. Most notably it is revered as an excellent nerve tonic due to it's ability to soothe and repair nerves which helps the body to deal with stress. It is also said to regenerate where damage has been caused by degenerative diseases like Parkinsons, Alzheimers and Huntingtons.