Analysis of quality parameters and preservative concentrations in Sahacharadi Kwatha: A comparative study of three commercial brands.

Background: Sahacharadi Kwatha is traditionally employed in Ayurvedic therapy for "vata" related conditions such as back pain, herniated disc, palsy, sciatica, and paralysis. Classical Ayurvedic texts recommend the use of freshly prepared Kwatha for optimal patient benefits. However, in response to the commercialization of Ayurveda and the demand for convenient over-the-counter (OTC) formulations, various commercial preservatives have been incorporated by Ayurvedic manufacturers to facilitate OTC preparation and prolong shelf life.