The invention relates to an advanced food material in the form of a composition for lowering the glycemic index of a foodstuff and a composite comprising said composition and said foodstuff particularly, but not exclusively, wherein said foodstuff has a glycaemic index which is favourably lowered by the addition of said material. Said composition comprises or consists of insoluble resistant starch in an amount of 40-80% by weight of the composition, soluble fibre, and at least one carbohydrate enzyme in hibitor.
