Zinc normalized blood sugar in prediabetes
The body needs zinc to efficiently use insulin, metabolize carbohydrates, and protect insulin-producing beta cells from inflammatory damage. In this study, doctors gave 55 pre-diabetic people 30 mg of zinc sulfate per day or a placebo. The study took place in Bangladesh, one of the most zinc-deficient regions of the world. After six months, those taking zinc saw fasting blood sugar levels decrease by 5.76 mg/dL, bringing readings from pre-diabetic levels back into the normal range. Doctors also measured pancreatic beta-cell function, insulin sensitivity and resistance, all of which improved in the zinc group.

Reference: Diabetes Research & Clinical Practice; May, 2016, Vol. 115, 39-46.
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