Gillian McKeith (born 1959) is a nutritionist, television presenter, an writer from Scotland. She previously hosted Channel 4's You Are What You Eat and Granada Television's Dr Gillian McKeith's Feel Fab Forever in the UK for several series. She writes a weekly column for Reveal magazine and is the author of a number of books about nutrition, including You Are What You Eat: The Plan That Will Change Your Life (2004).