The Power of the Sunshine Vitamin: Why Vitamin D Is Essential for More Than Just Bones

We’ve all heard that vitamin D is good for strong bones. And we know that calcium plays a key role too. But here’s the catch: without enough vitamin D, calcium can’t be properly absorbed and used by the body. That’s why those milk cartons proudly advertise their calcium and vitamin D content.

But bone health is just the beginning of what vitamin D does.

One major problem is that vitamin D deficiency is widespread. About 42% of Americans are deficient—but the disparities are stark. A staggering 82% of African Americans and 63% of Hispanics are affected. Why?

Vitamin D is primarily absorbed through the skin from sunlight. But with more time spent indoors, greater use of sunscreen and protective clothing, and the fact that melanin-rich (darker) skin absorbs less vitamin D from sunlight, many are left without enough.

There are two dietary forms:

• Vitamin D2 from plants (like mushrooms)

• Vitamin D3 from animal sources (like fish, egg yolks, or fortified foods)
  D3 is typically more effective in raising blood levels.

Today, vitamin D’s role in gut health is gaining attention. It supports healthy gut microbes and helps reduce inflammation. Low levels have been linked to higher risks of diverticulitis, colon cancer, and IBS (irritable bowel syndrome). Conversely, higher vitamin D levels are associated with better outcomes in colon cancer cases.

The takeaway?
Have your vitamin D level checked.
Consider safe sun exposure (outside peak hours of 10AM–4PM).
Talk to your healthcare provider about taking supplements—most people benefit from 2000 IU of vitamin D3 daily.

Your bones, gut, and entire body will thank you.

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