In this new study, researchers looked at 741 pregnant women. They found that 0.6% of them were deficient in vitamin D (<25 nmol/L). For women who had gestational diabetes, the risk of severe deficiency (<12.5 nmol/L) was higher. The authors concluded that vitamin D deficiency is linked to insulin resistance.
This is an important finding. Obesity is epidemic. Insulin resistance is a huge part of the problem. As you put on weight, your insulin works less effectively. Your body responds by making more. High insulin as well as high blood sugar is correlated with a host of degenerative diseases from coronary disease to cancer.
A simple way to keep your muscles strong as you get older (and it isn't exercise)
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There are two morals to this story. God designed humans to be outdoors. Don't think otherwise. And, please get your vitamin D (25 hydroxy vitamin D) level checked. If you are not in the higher range in the summer, that's not a good sign. And the best time to check is in March or April, the end of winter. Even my vitamin D level was low! You'll need to take 5,000 IU of
vitamin D daily to get your levels above 75 nmol/L.