This 'once aday' treatment has been scientifically developed for the removal of callus, hyperkeratosis and plaque which may occur on feet, hands, limbs and body. This 'once aday' treatment has been scientifically developed for the removal of callus, hyperkeratosis and plaque which may occur on feet, hands, limbs and body. It contains 25% urea, which is a natural moisturiser, as well as oat kernel oil, which has excellent softening and hydrating qualities. Once Callus Removing Balm is also available on prescription from healthcare professionals in the UK, and is suitable for people with diabetes.