What are the optimal levels of vitamin D for health, and how can supplementation help?
The optimal target for 25(OH)D levels is between 75–100 nmol/L (30–40 ng/mL), which is significantly higher than the conventional deficiency threshold of 50 nmol/L. Supplementation with 2000–4000 IU/day of vitamin D3, combined with vitamin K2, can help achieve these optimal levels, especially in populations with limited sun exposure.
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