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  1. Vitamin D - Mayo Clinic

    Mar 21, 2025 · Taking a vitamin D supplement or a multivitamin with vitamin D may help improve bone health. The recommended daily amount of vitamin D is 400 international units (IU) for children up to …

  2. How much Vitamin D should you take? - Drugs.com

    Aug 11, 2025 · Most adults need 600–800 International Units (IU), or 15–20 micrograms (mcg), of vitamin D per day to support bone and immune health. The exact amount depends on your age, …

  3. What Vitamin D Dosage Is Best? - Healthline

    Dec 20, 2024 · In the United States, current guidelines suggest that consuming 400–800 International Units (IU), or 10–20 micrograms (mcg), of vitamin D should meet the needs of 97%–98% of all …

  4. Vitamin D: How Much to Take Per Day and Max Dose - GoodRx

    Aug 1, 2025 · According to most medical experts, the recommended dietary allowance (RDA) of vitamin D for adults up to age 70 is 600 IU. But some professional organizations recommend 20 mcg per …

  5. What Are the Normal Vitamin D Levels by Age? - Verywell Health

    Nov 30, 2025 · According to the National Institutes of Health Office of Dietary Supplements, the average recommended daily intake of vitamin D for most adults, children, and teens is 600 IU, and 400 IU for …

  6. How much vitamin D do I need? The amount of vitamin D you need each day depends on your age. Average daily recommended amounts are listed below in micrograms (mcg) and International Units …

  7. New guidelines released for vitamin D testing and supplementation

    Nov 1, 2024 · Updated guidelines say adults don't need routine testing of vitamin D levels. However, they should aim for daily vitamin D intake of 600 international units (IU) until age 70, and 800 IU after …

  8. The Ultimate Guide to Vitamin D Dosage for Every Age

    Dec 23, 2025 · Find the right vitamin D dosage by age for your family. Support bone health and immunity at every stage.

  9. Vitamin D deficiencies: What to know - MD Anderson Cancer Center

    How much vitamin D should you be getting – and what should you do if you need more? We called on a dietitian and a dermatologist for answers. Read on for their tips on how to safely get enough vitamin …

  10. New Guidelines Highlight Who Should Be Getting More Than the ...

    Nov 18, 2025 · New guidelines share how much vitamin D people should take based on their age and certain conditions. Not everyone should exceed the DRI of vitamin D, and vitamin D deficiency …