MacDougall began writing the occasional screenplay in the late 30s, working both alone and in collaboration with others. Most of his plays were produced during the 50s. As a screenwriter, his best-known films are The Man in the White Suit (for which he received a 1952 Academy Award nomination) and The Mouse That Roared. He was a cousin of Alexander Mackendrick.
The Roger MacDougall diet
In the 1953 he was diagnosed with multiple sclerosis which eventually resulted in significant disability. Through disillusionment with orthodox medical treatments at the time, he developed a diet, loosely based on a paleolithic diet, that apparently returned him to good health and sustained remission. Following this experience, he published a pamphlet describing his diet intended to help other patients to achieve similar results. This diet produced positive results in other patients, though success was not universal.
- "The Man on the Beat". British Council. Retrieved 17 March 2014.
- Graham, Judy (2010). Managing Multiple Sclerosis Naturally: A Self-help Guide to Living with MS. Simon and Schuster. p. 58. ISBN 9781594779077.