Vitamin D (calciferol) is a fat-soluble vitamin that helps support strong bones, maintain muscle function, strengthen the immune system, and promote mental well-being. Vitamin D has two forms ...

As listed by the USDA, one whole egg yolk packs a whopping 218 IU in vitamin D. Simply making a frittata or some scrambled ...

There are two types of vitamin D supplements available for over-the-counter purchase (vitamin D2 and vitamin D3). Vitamin D3 is the type that most experts believe should be utilized in clinical ...

The Vitamin D Blood Test (25-OH Vitamin D): Who, How, When, and Where Clinically speaking, things began to change in the 1970s when the blood test for vitamin D (known as the "25-OH vitamin D ...

Vitamin D3, a form of vitamin D that we get from certain foods and exposure to sunlight, is an essential nutrient that plays a role in many bodily functions. This fat-soluble vitamin helps the ...

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Our stories are reviewed by medical professionals to ensure you get the most accurate and useful information about your health and wellness. For more information, visit our medical review board.

Everyday Health independently vets all recommended products. If you purchase a featured product, we may be compensated. Learn why you can trust us. Adding vitamin D supplements to your diet can ...

Breastfed infants and children with certain medical conditions are also susceptible to vitamin D deficiency. If a healthcare professional has recommended a vitamin D supplement for calcium ...

The Standard's journalism is supported by our readers. When you purchase through links on our site, we may earn an affiliate commission. Didn’t your parents always tell you when you were young ...

Arielle Burton is an associate content manager on CNET's Performance Optimization team. She graduated from Hofstra University in New York. Prior to joining CNET, she worked with legacy news ...

Many people are saying up to 1200 units every single day. Why? Because you need that much D to absorb the calcium, you need that much D to have good muscle function. If you have less D in your ...