Dietary history:
assess the intake of calories and sources of essential nutrients. For guidance, there are 9 kcal per g of fat and 4 kcal per g of carbohydrates and protein.
Food intolerances:
patients with irritable bowel syndrome often report specific food intolerances, including wheat, dairy products and others.
Painless diarrhoea may indicate high alcohol intake, lactose intolerance or coeliac disease.
