“Also, foods that contain or are cooked with fat and protein slow down the absorption of carbohydrate, lowering their GI,” the NHS notes.
For example, crisps have a lower GI than potatoes cooked without fat.
However, crisps are high in fat and should be eaten in moderation.
“If you only eat foods with a low GI, your diet may be unbalanced and high in fat,” warns the NHS.
