I've just started cycling again and I'm on a high fat diet,

@Subsumedpat: I eat high protein too. Do you mean night protein but low fat?

no just high protein and what carbs you eat with it need to be low in the glycemic index like most fruits and vegetables, beans, minimally processed grains, pasta, low-fat dairy foods, and nuts. Carbs high on the glycemic index like white bread, rice cakes, most crackers, bagels, cakes, doughnuts, croissants, most packaged breakfast cereals, will spike your blood sugar.