The most famous Ayurvedic Rasayana is probably Amrit Kalash. Most likely, you have already seen or tried it, be it in a Panchakarma course of treatment, through a recommendation, or when you were getting acquainted with Ayurveda and popular medicinal plants.
Amrit Kalash typically comes in the form of a boiled-down paste, with an unusual consistency and a sweetish taste. Most people like taking it. Read more