This document provides an overview of the basic concepts of Agni (digestive fire) in Ayurveda. It discusses: - Agni's importance for health and digestion according to Ayurvedic texts. - The five types of Agni and their roles in digestion. - Causes of impaired Agni and how this leads to disease through the production of Ama (toxins). - Methods of purifying Agni discussed in Ayurvedic texts, including herbal remedies, physical therapies and lifestyle changes.