Vitamin D - Wikipedia
Unlike the other twelve vitamins, vitamin D is only conditionally essential, as with adequate skin exposure to the ultraviolet B (UVB) radiation component of sunlight there is synthesis of …
Vitamin D - Mayo Clinic
Mar 21, 2025 · Vitamin D is a nutrient the body needs, along with calcium, to build bones and keep them healthy. The body can absorb calcium only if it has enough vitamin D. Calcium is a …
Vitamin D: Overview, Uses, Side Effects, Precautions ... - WebMD
Learn more about Vitamin D uses, effectiveness, possible side effects, interactions, dosage, user ratings and products that contain Vitamin D.
Vitamin D - Consumer - Office of Dietary Supplements - Vitamin D
Vitamin D helps maintain strong bones. Learn how much you need, good sources, deficiency symptoms, and health effects here.
Vitamin D: MedlinePlus Medical Encyclopedia
Vitamin D is a fat-soluble vitamin. Fat-soluble vitamins are stored in the body's fatty tissue and liver. Vitamin D helps the body absorb calcium. Calcium is a mineral that you must have for …
What Happens to Your Body When You Take Vitamin D Regularly
Dec 18, 2025 · Vitamin D is involved in many bodily functions and plays a vital role in immune health and maintaining healthy bones and teeth. Vitamin D is produced when you expose your …
Vitamin D: Benefits and How Much You Need
Oct 25, 2024 · Vitamin D (calciferol) keeps bones strong and supports your immune system. People ages 1 to 70 need 15 mcg (600 IU) per day; people 70+ need 20 mcg (800 IU).