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>Dosage of Vitamin D (Vitamin D A Rapid Review. Medscape)
2000 IU (50 mcg) per day increases vitamin D blood levels 20 ng/ml (50 nmol/L). This is my recommended dosage for Psoriasis prescribed by my dermatologist.
Read full story of below at Source: >Study confirms vitamin D protects against colds and flu – Harvard Gazette”
“A new global collaborative study has confirmed that vitamin D supplementation can help protect against acute respiratory infections. The study, a participant data meta-analysis of 25 randomized controlled trials including more than 11,000 participants, has been published online in The BMJ.
“Most people understand that vitamin D is critical for bone and muscle health,” said Carlos Camargo of the Department of Emergency Medicine at Massachusetts General Hospital “Our analysis has also found that it helps the body fight acute respiratory infection, which is responsible for millions of deaths globally each year…
“Meta-analyses of these trials, which aggregate data from several studies that may have different designs or participant qualifications, also had conflicting results. To resolve these discrepancies, the research team — led by Adrian Martineau from Queen Mary University of London — conducted an individual participant data meta-analysis of trials in more than a dozen countries, including the U.S., Canada, and the U.K.
“The investigators found that daily or weekly supplementation had the greatest benefit for individuals with the most significant vitamin D deficiency (blood levels below 10 mg/dl) — cutting their risk of respiratory infection in half — and that all participants experienced some beneficial effects from regular vitamin D supplementation.
“Administering occasional high doses of vitamin D did not produce significant benefits.