I’ve written quite a bit about diabetes here and at my old blog, and I’ve explained to you how controlling blood pressure and cholesterol in diabetics prevents macrovascular disease, such as heart attack and stroke. I’ve also explained how controlling blood sugar prevents microvascular disease such as kidney failure and blindness. In type II diabetics, controlling blood sugar prevents disability and sometimes death. In type I diabetics, controlling diabetes with insulin is the only way to prevent a swift and painful death. Most non-diabetics, however, don’t know the details of how we control blood sugar.

Let’s take an example. A typical type I diabetic, who is completely dependent on insulin, will take a long acting (basal) insulin to keep glucose levels down between meals, and will also take a short acting insulin at meals to account for the extra glucose load. In order to know how much short-acting insulin to take, a diabetic has to insert a test strip into their glucometer, prick their finger with a small needle, and touch the drop of blood to the test strip. This is usually done (at least) on waking, before every meal, and at bedtime—at least four times per day. Thankfully, blood glucose monitors are quite inexpensive and last a long time. Test strips, however, are expensive and disposable. How expensive? Depending on the brand of meter being used, and how many times you need to test, $30-$200 per month. These strips are usually not covered by insurance.

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