What is more important is once the targeted normal level of 30 ng/mL is reached, many patients do not get adequate vitamin D maintenance dosing. But if vitamin D2 is used the levels with the same dosage does not reach the normal of 30 ng/mL in the 3 month period. One protocol suggests 50,000 IU of vitamin D3 orally once weekly for 2 to 3 months, or 3 times weekly for 1 month. Whereas The Vitamin D Council recommends that healthy adults take 2,000 IU of vitamin D daily.ĭifferent protocols have been recommended to treat vitamin D deficiency. Currently the Recommended Dietary Allowance for vitamin D established by the Institute of Medicine is 600 international units per day until we reach 70 years of age, and 800 IU per day thereafter and raised the safe upper limit to 4,000 IU daily and this is based on 20 ng/mL (50 nmol/L) as adequate. Till the year 2000, in United States (US) the recommended vitamin D daily dose for men and women of ≤50 years was 200 IU/day. Fortification of commonly used food items was one source of supplementation of vitamin D. Most of patients develop due to inadequate exposure to sunlight and eating less of vitamin D containing foods. Vitamin D deficiency has been reported around the globe. It was recognized as early as 1860's that vitamin D is important for bone health and recently its importance in extra-skeletal health has come to light.
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