I am a type 1 diabetic. I take Lantus at night and Humalog on a sliding scale when I eat. I've always kind of just guessed at my Humalog but my resolution this year is to make the effort to manage my diabetes better. I know I'm supposed to add a unit for every 15g of carbs, but how do I determine what the base should be? Thanks.

Patty Bonsignore


Taking Humalog via sliding scale is a good way to start using Humalog, however, as you have found , it’s not as accurate as counting your carbs and taking insulin according to the amount of carbs you have eaten. The amount of insulin you take for the amount of carbs you eat is determined by an “insulin to carbohydrate ratio. “ This ratio is usually determined by a dietitian, a diabetes educator and/or an endocrinologist, and is based upon several factors including your weight, your daily insulin requirements and how your body responds to insulin. The first step you will want to take in changing over from a sliding scale to using advanced carb counting and insulin ratios is to meet with a registered dietitian (one who has experience with diabetes or is a certified diabetes educator is preferred). Before you make this appointment, write down on a food log what you are eating, how much insulin you are taking for the amount of carb you have eaten and all your blood glucose numbers. This information will greatly help the dietitian get you started with advanced carb counting.

January 17, 2013 at 10:13 am

1 reply

DiabeticYogi 2013-02-02 15:47:31 -0600 Report

Once one understands the insulin-carb ratio and how to carb count then one can determine their own insulin to carb-ratio. Same is true with basal rate and correction factor. Every Type 1 should be able to do this on their own with initial education and ongoing consultation from health care professionals, in my humble opinion. This is when you are truly "Flying Your Own Plane."