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With an intake of 4000 IU for two years, the level of D3 in the blood stabilized at 60 ng/ml, then it increased to 82 ng/ml so I took only 2100 IU for a month, yet D3increased to 84 instead of being lower. I am a male with almost no fat and 60 years of age.

Asked by  lchene81175300 on February 27, 2015

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