Normal vitamin D levels by age, sources, and toxicity - Medical …
2023年12月21日 · Generally adequate vitamin D levels in the blood are 20 ng/ml or above for adults. People aged 1–70 years should aim to get at least 15 mcg or 600 IU of vitamin D per day.
Vitamin D Deficiency: Causes, Symptoms & Treatment
Anyone can have vitamin D deficiency, including infants, children and adults. Vitamin D deficiency may be more common in people with higher skin melanin content (darker skin) and who wear clothing with extensive skin coverage, particularly in Middle Eastern countries.
Vitamin D - Mayo Clinic
2023年8月10日 · If your doctor suspects you're not getting enough vitamin D, a simple blood test can check the levels of this vitamin in your blood. 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 ...
Vitamin D - Health Professional Fact Sheet - Office of Dietary ...
Vitamin D promotes calcium absorption in the gut and maintains adequate serum calcium and phosphate concentrations to enable normal bone mineralization and to prevent hypocalcemic tetany (involuntary contraction of muscles, leading to cramps and spasms). It is also needed for bone growth and bone remodeling by osteoblasts and osteoclasts [1-3].
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 Deficiency > Fact Sheets - Yale Medicine
Vitamin D deficiency is the state of having inadequate amounts of vitamin D in your body, which may cause health problems like brittle bones and muscle weakness. There may be no symptoms and doctors don’t routinely check vitamin D levels, so …
Vitamin D deficiency in adults: Definition, clinical manifestations ...
2024年7月29日 · Overt vitamin D deficiency, characterized by hypocalcemia and/or hypophosphatemia and rickets and osteomalacia in children and osteomalacia in adults, is now uncommon in most developed countries (see "Epidemiology and etiology of osteomalacia" and "Clinical manifestations, diagnosis, and treatment of osteomalacia in adults").
Vitamin D Deficiency: Causes, Symptoms & Health Risks - WebMD
2024年4月10日 · Vitamin D is essential for healthy bones, & a lack of it can lead to health problems, including cardiovascular disease. Know how to get plenty of vitamin D & treat deficiency.
Vitamin D deficiency - Mayo Clinic
2022年10月7日 · Vitamin D deficiency — when the level of vitamin D in your body is too low — can cause your bones to become thin, brittle or misshapen. Vitamin D also appears to play a role in insulin production and immune function — and how this relates to chronic disease prevention and cancer — but this is still being investigated.
Vitamin D Test - MedlinePlus
Most vitamin D blood tests measure the level of 25 (OH)D in your blood. Your kidneys use 25 (OH)D to make "active vitamin D." Active vitamin D lets your body use calcium to build bone and helps other cells work properly.