I use insulin and prefer to stick with the carb/fat/protein breakdowns meaning I have to use
carb counter books to figure out the values of what I eat so that I can match 1 unit of Humalog against 10 grams of carbs. I just started using Lantus and it works like a miracle now! So, you need to give more specifics about type of diabetes, medications, exercise, etc. and timing of meals.