Carbohydratess are the main source of fuel for the body. You need carbohydrates to keep your energy levels up for intense training sessions. Carbohydrate supplements fall into three main categories, simple carbohydrates, complex carbohydrates and waxy maize starch. Check out our full range of carbohydrate supplements below or select a sub-category to narrow your search. M&S has low prices on all carbohydrate supplements!