Ashwagandha (aka Somnifera dunal) is an adaptogenic herb that’s popular in Ayurvedic medicine. It has been used for more than 2,500 years. It’s actually the most commonly used and extensively researched adaptogen herb. It’s valued for its thyroid-modulating, neuroprotective, anti-anxiety, antidepressant and anti-inflammatory properties, which are just some of the many ashwagandha benefits.