Test your vitamin D levels (either through your health care provider or with a test at home) is an important step in achieving truly optimal serum 25(OH)D results (which is 50ng/mlfor the record).
Once you have your base level, take a bonus D3 supplement at an effective dose (i.e., 5,000 IU) daily can help you achieve and maintain sufficiency (view a roundup of mbg’s best D3 supplement picks here). By doing so, you will significantly reduce your risk of premature death.
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