Roger MacDougall, a screenwriter and playwright who promoted the diet he used to control multiple sclerosis, died May 27. He was 82.

MacDougall made his name in the 1950s with “The Man in the White Suit,” a script he wrote with John Dighton and Alexander Mackendrick. The movie, a satire on materialism, starred Alec Guinness.

His plays included “The Gentle Gunman,””To Dorothy a Son” and “MacAdam and Eve” in 1950; “Escapade,” 1952; “The Facts of Life,” 1954; “The Delegate,” 1955; “Double Image,” 1956; “Hide and Seek,” 1957; “Trouble With Father,” 1964; and “Jack in the Box,” 1971.

In the 1950s MacDougall developed multiple sclerosis. He went on a strict, nearly carbohydrate-free diet and by 1970 was on his feet again. He published articles and pamphlets on his diet.