From North Carolina, USA:
Since the weather here has reached the 90's, it seems that my sugar has gone up. Does the heat affect blood sugar levels?
Summer heat affects blood glucose control causing either higher or lower blood glucoses, or just more erratic values in general. The most common summer related blood glucose change is dehydration. When you go out in the sun and perspire, you lose water, but not blood glucose. If you do not replace the water by drinking a lot of fluid, your blood glucose concentration will tend to rise.
On the other hand, during the warm weather we tend to exercise more, eat less, and change our meal times. These changes can lead to a low blood glucose reaction.
Additional Comment from Dr. Lebinger:You should also make sure that your insulin hasn't spoiled due to exposure to extreme heat. Unless your house is air conditioned 24 hours a day, you should keep the insulin you are using in the refrigerator during temperatures in the 90's and make sure if you take it with you during the day that you keep it cool in a freezer pack (but don't let it freeze either!).
Original posting 24 Jul 97
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