Medically reviewed by Jamie Johnson, RDN Mushrooms, when grown under ultraviolet (UV) light, can be a good source of vitamin ...

Taking vitamin D2 may lower vitamin D3 levels, suggesting the two forms aren’t interchangeable. Vitamin D3 appears more effective for maintaining healthy vitamin D levels in the body. Few foods ...

Researchers analyzed 11 trials with 655 adults and discovered that taking vitamin D2 supplements decreases the body's vitamin ...

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While vitamin D is vital for bone and immune health, a longevity doctor warns against blindly supplementing. Excessive intake ...

Milk is another drink that is often fortified with vitamin D to help us get this valuable nutrient. Like orange juice, milk is not a natural source of vitamin D, but the FDA allows manufacturers to ...

Vitamin D2 supplements may negatively impact circulating levels of vitamin D3 and negate the latter's potential benefits, ...

A study found that daily vitamin D supplements helped slow telomere shortening—the cellular process linked to aging and ...

Research warns that one widely used vitamin D supplement may unintentionally lower the body’s natural D3 levels.

Routine data from laboratories reveal a decline in vitamin D levels during the Covid-19 pandemic, especially in older women ...

Since vitamin D accumulates in the body, taking a high-dose supplement may lead to vitamin D toxicity. This causes nausea, vomiting, and weakness.

Vitamin D deficiency often sneaks up on people, even those who are careful about what they eat and always trying to make ...