Abstract: Yoga and meditation have long been considered to have beneficial effects on health. Many yoga camps in India banking on this belief claim to have the powers of reversing the ill effects of degenerative diseases. This paper examines the cumulative beneficial effects of Yoga, Meditation and changed food habits designed by one such camp, the Siddha Samadhi Yoga (SSY) camp on Obese and Non Insulin Dependent Diabetes Mellitus (NIDDM) subjects. Thirty obese and thirty NIDDM male subjects free from additional complications belonging to twenty five to forty five years of age were selected from two camps conducted in Mahaboob Nagar and Tirupathi.