Dr. Robert S. (Zalman Shaul) Mendelsohn, M.D.[a 1], (13 July 1926 – 5 April 1988 in Evanston, IL) was a practicing American pediatrician who authored several bestselling books on healthcare, appeared on TV and radio, and wrote a syndicated medical advice column.
Beloved by many for his practical advice, Mendelsohn encouraged people to take a judicious approach to their medical care. He was a proponent of natural childbirth, breastfeeding, and limited medical intervention, while warning against the overuse of prescription medications and unnecessary surgery, which he called “ritual mutilation.” Mendelsohn was deeply troubled by circumcision, writing and speaking against the practice. 
Mendelsohn is mentioned In Memorium in Rosemary Romberg's book Circumcision: The Painful Dilemma.
- Mendelsohn R (1984): How to Raise a Healthy Child In Spite of Your Doctor. Ballantine Books. ISBN 978-0345342768.
- Wikipedia article: Robert S. Mendelsohn. Retrieved 14 January 2021.
Doctor of Medicine, Wikipedia. Retrieved 14 June 2021. In the United Kingdom, Ireland and some Commonwealth countries, the abbreviation MD is common.
Retrospective: Robert S. Mendelsohn, M.D., Beyond the Bris. Retrieved 14 January 2021.