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The 500 Rule

The 500 Rule (aka 450 Rule) from Using Insulin and the Pocket Pancreas is a great way to estimate how many grams of carbohydrate will be covered by one unit of Humalog or Novolog insulin. This is your insulin to carb ratio or your carb factor. Once you know this, you can count the grams of carb in the food you want to eat and divide by your carb factor to find how many units of bolus insulin are needed to cover the carbs. This allows flexibility in your food choices because any number of carbs can be covered with a matching dose of insulin. The 500 Rule used to determine your carb factor depends on accurately knowing your TDD. As with basal doses, an accurate carb factor can be determined only after you've calculated an accurate TDD for yourself. The 500 Rule: estimates grams of carb per unit of Humalog or Novolog insulins (the 450 Rule is used with Regular insulin) 500 divided by your TDD (Total Daily Dose of insulin) = grams of carb covered by one unit of Humalog or Novolog Lets you keep your post meal readings normal! Example: Someone's TDD = 50 units (i.e., the total amount of say Humalog and Lente insulins they used per day). 500/50 = 10 grams of carbohydrate covered by each u Continue reading >>

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Popular Questions

  1. Jaynielynne

    One of my cousins said that she has had RLS for the past 3 years. She gave
    me an article that discusses RLS and Metformin (a diabetes drug) I thought
    that I would pass this along because she wants to know if anyone else has
    had this same problem. She is on Metformin and has been for 3 years. Here
    is the article or whatever you want to call it. treato.com/Metformin,RLS/?a=s

    I hope that the link works. Thank you for your input.

  2. jumpylegs

    Link didn't work for me.

  3. Elisse

    Link doesnt work, but i have been researching metformin and all i can find is it seems to cause leg cramps for alot of people, cant find anything which says RLS and metformin....

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