Vitamin D may help prevent diabetes, depending on genes

More than two in five U.S. adults have prediabetes, a condition marked by higher-than-normal blood sugar levels that often leads to type 2 diabetes. A new study finds that vitamin D may help delay or prevent that progression, ...

Why fasting can lead to a longer lifespan

Restricting calories has long been recognized as a powerful way to live longer, with periods of intermittent fasting proving more effective than a steady diet. However, the mechanism behind this phenomenon has been unclear. ...

Fluoride and kids' IQ: What a decades-long analysis shows

Fluoride is a naturally occurring mineral that has been shown to strengthen teeth and reduce cavities. Many municipalities add fluoride to their drinking water—a process called community water fluoridation—as a public health ...

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