what is a carbohydrate ratio
Whichever insulin is used, success comes from matching the dose to the amounts of carbohydrate eaten. This is where I:C ratios come in. The I:C ratio specifies how many grams of carbohydrate are âcoveredâ by each unit of insulin. For example, a 1-unit-per-10-grams-of-carb (1:10) ratio means that one unit of insulin covers 10 grams of carbohydrate. A 1:20 ratio means that each unit covers 20 grams. Calculating a meal or snack dose becomes simple when you know your I:C ratio: Simply divide your carbs by your ratio.