The Feingold Diet (also known as the Feingold Program or KP Diet) is a type of exclusion diet which requires the individual to avoid artificial additives and salicylate
The Feingold diet is based on the idea that some additives (such as synthetic colourings, flavourings, and preservatives) are harmful. It is also based on the idea that salicylate (which is a natural plant toxin found in some foodstuffs such as citrus fruits and some medicines such as aspirin) is harmful.
The Feingold Association of the United States claims that the diet can be used to treat people with a wide range of conditions including autism and ADHD. It also states that it can be used to help tackle a wide range of mental and physical health problems including gastro-intestinal problems and sleep disturbances.