Marc Halpern (Siva), AyD. DC, is an Ayurvedic Doctor, Chiropractor, and Sivananda Yoga teacher. Founder and President of the California College of Ayurveda, he is the author of the popular book Healing Your Life: Lessons on the Path of Ayurveda and the creator of the bestselling recording Yoga Nidra and Self-Healing. A leader in the field, Dr. Halpern is also co-founder of the National Ayurvedic Medical Association and President of the National Council on Ayurvedic Education. He authored three textbooks and co-authored several published research papers, receiving numerous awards for his service in Ayurveda in both India and the United States.