Normal vitamin D levels by age, sources, and toxicity - Medical News Today
2023年12月21日 · For adults, a level of vitamin D in the blood of 20 nanograms per milliliter (ng/mL) or above is generally considered adequate. Levels below 20 ng/mL are generally too low for adequate bone...
Vitamin D: What's the "right" level? - Harvard Health
2020年4月16日 · Based on their analysis, a more appropriate cutoff for vitamin D deficiency would be much lower, 12.5 ng/mL. They examined a massive amount of data from the National Health and Nutrition Examination Survey (NHANES) for 2007 through 2010 and found that less than 6% of Americans had vitamin D levels less than 12.5.
Vitamin D - Health Professional Fact Sheet - Office of Dietary ...
Vitamin D overview for health professionals. Research health effects, dosing, sources, deficiency symptoms, side effects, and interactions here.
Vitamin D - Mayo Clinic
2023年8月10日 · Taking 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 age 12 months, 600 IU for people ages 1 to 70 years, and 800 IU for people over 70 years.
Vitamin D - StatPearls - NCBI Bookshelf
2023年4月9日 · The Endocrine Society recommends a preferred range of 40 to 60 ng/mL. In contrast, the National Institute of Health defines vitamin D deficiency as less than 20 ng/ml. Some authorities define insufficiency as 12 to 19 ng/mL and deficiency as less than 12 ng/mL.
What Is the Optimal Vitamin D Level? - NutritionFacts.org
2019年4月30日 · If we measure vitamin D levels in those living traditional lives in the cradle of humanity, a normal vitamin D level would be over 100 nmol/L (40 ng/ml). So, maybe that should be the starting point until proven otherwise—a concept, regrettably, many guideline committees seem to have ignored.
25-hydroxy vitamin D test - MedlinePlus
2024年5月20日 · Normal Results. The normal range of 25-hydroxy vitamin D is measured as nanograms per milliliter (ng/mL) or nanomoles/liter (nmol/L). Many experts recommend a level from 20 and 40 ng/mL or 60 and 100 nmol/L. Others recommend a level from 30 to 50 ng/mL (75 to 125 nmol/L). The examples above are common measurements for results of these tests.
Vitamin D - Consumer - Office of Dietary Supplements (ODS)
Health Professional. Other Resources. Table of Contents. What is vitamin D and what does it do? How much vitamin D do I need? What foods provide vitamin D? Can I get vitamin D from the sun? What kinds of vitamin D dietary supplements are available? Am I getting enough vitamin D? What happens if I don’t get enough vitamin D?
Vitamin D Test: Purpose, Risks, and Results - Health
3 天之前 · Normal vitamin D levels can range between 20 and 50 nanograms per milliliter, which is ideal for bone and overall health. High Vitamin D Levels Although rare, high levels of vitamin D can occur ...
Vitamin D - The Nutrition Source
RDA: The Recommended Dietary Allowance for adults 19 years and older is 600 IU (15 mcg) daily for men and women, and for adults >70 years it is 800 IU (20 mcg) daily. UL: The Tolerable Upper Intake Level is the maximum daily intake unlikely to cause harmful effects on health.