The quality of ashwagandha supplements depends on withanolides levels and ensuring that the raw ingredients contain the minimum amount. When choosing an ashwagandha supplement, you want to be sure the ingredients are "standardized" to contain a minimum amount of these nutrients. Vitabase Ashwagandha is standardized to provide a minimum 4.5 percent of these nutrients. Ashwagandha has long been used in Ayurvedic medicine for the treatment of a wide range of health concerns. It's been shown to help reduce oxidative stress, to have some effect on brain functioning, and in combined treatments to increase energy, restore balance, and in more recent studies as an aid in relieving Anxiety Syndrome (see note 1). Ashwagandha is a powerful tonic and anti-oxidant and is often included in other supplement compounds for specific purposes, such as thyroid treatments (see note 2).

http://www.ncbi.nlm.nih.gov/pmc/articles/PMC272937...

.Note 2: If you have an interest in thyroid support, also take a look at our Vitabase Thyroid Supplement listed under Personal & Health Supplements