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  1. 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 …

  2. Vitamin D - Wikipedia

    Several forms (vitamers) of vitamin D exist, with the two major forms being vitamin D 2 or ergocalciferol, and vitamin D 3 or cholecalciferol. [1] The common-use term "vitamin D" refers …

  3. Vitamin D: Overview, Uses, Side Effects, Precautions ... - WebMD

    Vitamin D is found in fish, eggs, and fortified milk. It's also made in the skin when exposed to sunlight. During periods of sunlight, vitamin D is stored in fat and then released when...

  4. 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.

  5. Vitamin D: Benefits and How Much You Need - Cleveland Clinic …

    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).

  6. 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 …

  7. Vitamin D: Deficiency, Symptoms, Foods & Supplements

    Feb 17, 2021 · Learn how to spot vitamin D deficiency symptoms, what foods are high in vitamin D, how much to take daily, and whether D2 or D3 is best for you.

  8. Vitamin D - The Nutrition Source

    It is a fat-soluble vitamin that has long been known to help the body absorb and retain calcium and phosphorus; both are critical for building bone. Also, laboratory studies show that vitamin …

  9. 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 …

  10. Vitamin D - NHS

    Vitamin D helps regulate the amount of calcium and phosphate in the body. These nutrients are needed to keep bones, teeth and muscles healthy. A lack of vitamin D can lead to bone …