Yatish Agarwal, MBBS, MD, DSc, is a renowned physician, writer and health columnist. His popular books, articles, columns, radio broadcasts and TV shows have spread the message of good health and sensible living to millions in India and the subcontinent. Honoured with several prestigious national awards for his path-breaking work, Dr Agarwal works and teaches at New Delhi’s Safdarjung Hospital and V M Medical College. He has also been a National Consultant to the WHO, and a Fellow at the National Cancer Center Hospital, Tokyo, and Institute of Population and Social Research, Mahidol University, Thailand.