Marilyn Diamond


Marilyn Martha Diamond was an American author and speaker on the topic of anti-aging and longevity. She was known for advocating a "cleansing" or "detoxification" diet.

Life and career

Marilyn Martha Horecker was born in Washington, D.C. on June 4, 1944, the daughter of Bernard and Frances Horecker. Her father was a biochemist and served as dean of the Weill Cornell Graduate School of Medical Sciences. She grew up in Maryland and New York, and graduated from New York University in 1968, where she studied the Romance languages.
In 1985, with her then husband Harvey Diamond, she co-authored the best-selling health and wellness book Fit for Life. The book built on the natural health movement that had roots in 19th century, and was part of the development of the fascination with celebrity beauty in contemporary American culture.
Diamond's ideas about diet and aging have been the subject of controversy in the media. In particular, nutritionists disagree with her assertion that some foods should not be eaten together.

Personal life and death

Diamond was married three times and had three children, a daughter and two sons. She died from complications of dementia in Roanoke, Virginia, on September 7, 2025, at the age of 81.