In April 2026, a walk down the supplement aisle at any major pharmacy tells a striking story: vitamin D capsules containing 5 ...

More than 40 percent of the U.S. population is estimated to have a vitamin D deficiency, especially in regions with less year-round sun exposure. The vitamin, which is vital for the body’s absorption ...

Plus, how to combat it.

Add Yahoo as a preferred source to see more of our stories on Google. Do you ever feel like you take an endless supply of vitamins and supplements but are potentially not meeting your true needs?

Running errands, wrestling with work deadlines, doing yardwork and household chores, tending to family and loved ones’ needs — we all have days that prove taxing and tiring. But when tiredness and out ...

Some studies have given healthy individuals 100,000 IU tablets or more once every 4 to 6 months without acute toxicity (Wolpowitz & Gilchrest, 2006). A 21-year-old man or women exposed to summer UVB ...

Nutrition experts have been grumbling for years that the government got our vitamin D recommendations wrong. When the Institute of Medicine (IOM) guidelines of 600 IU a day were released in 2010, ...

This article was originally featured on Knowable Magazine. Nutritional science is supposed to chart a course to our healthier selves. But contradictory scientific results and interpretations can muddy ...

There is no doubt that our bodies need vitamin D. It helps regulate the absorption of calcium and phosphorus in our bones, helps our cells to communicate with each other, and helps strengthen our ...

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." Do you ever feel like you take an endless supply of vitamins and supplements but are potentially not ...