Asavas and Arishtams are unique fermented herbal drinks in Ayurveda, not found in any other herbal tradition. They are prepared using a special yeast along with numerous herbs according to a long process of fermentation, which allows the properties of the herbs to be extracted into the liquid ferment.
Asavas and Arishtams are ideal medicines because they allow for the easy absorption of herbs for those suffering from weak digestion and malabsorption, or those having ama (undigested food mass) in the digestive tract. Whatever herbs we may take, however right the prescription, must have a limited effect, if they are not properly absorbed. Tonic herbs like ashwagandha in particular may not be easily absorbed owing to their heavy nature.