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 …
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 …
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, …
Vitamin D - Health Professional Fact Sheet - Office of Dietary …
Serum concentration of 25 (OH)D is the main indicator of vitamin D status. However, the serum concentrations of 25 (OH)D that are associated with vitamin D deficiency have not been definitively …
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 …
How much vitamin D do you need? - Harvard Health
Jan 31, 2019 · While some people argue for much higher levels, the IOM report concluded that vitamin D blood levels above 20 ng/ml are adequate for maintaining healthy bones, and that most people in the …
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 …
What is the recommended dose of vitamin D3 (cholecalciferol) for ...
Oct 26, 2025 · For older adults (≥71 years), the recommended daily intake increases to 800 IU 2, 1 For individuals at risk of vitamin D deficiency, higher doses of 1,500-4,000 IU daily may be appropriate 3
Vitamin D: Benefits and How Much You Need - Cleveland Clinic Health ...
Oct 25, 2024 · “When your body has enough vitamin D, it’s better able to absorb calcium from your small intestine.” Studies show that when your body has enough vitamin D, its overall calcium absorption is …
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 …