You’ve been told since childhood that washing your hands keeps germs away. This healthy habit may also help you manage your diabetes.
Clean hands get you the most accurate readings from your glucose meter, according to two new studies. Here’s the lowdown on scrubbing up.
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A Fruity Dilemma
You’re probably used to hitting the sink to wash up before meals. But it might be just as important to wash your hands after you dine, especially if fruit is on the menu.
Peeling oranges, grapes, or kiwis can result in too-high blood glucose readings, researchers report in Diabetes Care. And eating fruit held in your hand likely has the same effect. The produce leaves a residue of glucose on your hands. Washing it away with soap and tap water helps make sure it doesn’t interfere with your test results.
Take Two
In a second study published in the same journal, researchers found that unwashed hands changed glucose meter readings by up to 10 percent.
What if you aren’t able to wash your hands before checking your glucose level? After pricking your finger with the lancet, wipe away the first drop of blood. Then, use the second one for a more accurate reading. However, this method won’t work if your hands are visibly dirty or if you’ve handled fruit.
Why Results Matter
Your good health depends in part on how well you monitor your blood glucose. Your health care team can teach you how to use your results to decide when and how much to eat, exercise, or take insulin or other medicines.
In general, your blood glucose should be 70 to 130 mg/dl before meals and less than 180 mg/dl after meals. If dirty hands cause falsely elevated readings, you may take too much insulin. This can cause shakiness, weakness, headache, and other symptoms of low blood glucose.

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