There are two primary forms of vitamin D—D2 (ergocalciferol) and D3 (cholecalciferol). A vitamin D test, specifically the 25-hydroxyvitamin D blood test, is used to diagnose deficiency.

Vitamin D supplements are popular for bone health and immunity. When is the best time to take vitamin D? Here's how to take it properly, according to experts.

Vitamin D3 supplementation was associated with antihypertensive effects without significant between-dose differences among overweight older adults.

They'll likely recommend vitamin D3 since it's what the body naturally produces, and it's more effective than D2 and can ...

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 ...

Study Questions the Role of Vitamin D2 in Human Health but Its Sibling, Vitamin D3, Could Be Important for Fighting Infections Feb. 25, 2022 — New research has found significant differences ...

With cold and flu season on the rise, plus seasonal affective disorder rearing its ugly head, our immune systems take a hit. One nutrient that is great at fighting against attacks on our bodies is ...

Feb. 3, 2025 — Maternal vitamin D levels in the first trimester were related to both prenatal growth and pregnancy outcomes, according to a new study. Low vitamin D levels during the first ...

Products are independently selected by our editors. We may earn an affiliate commission from links. If you count broccoli, cauliflower, and Brussels sprouts as among your most-frequently eaten ...

Vitamin D3 seemed more effective than D2 at raising this important blood test. Furthermore, preliminary work showed that enzymes in the liver and the final vitamin D receptors (VDR) in important ...

Vitamin C is a health superstar. It’s essential for healthy skin, bones, teeth and gums. It supports the immune system, and helps the body absorb iron and heal wounds. It’s a strong ...