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25(OH)D levels at baseline (N = 26) (A) and after 48 weeks of supplementation (N = 20) (B), compared between non-carriers (left group) and carriers (right group) of the rs4588 and rs7041 risk alleles. P-value shown is calculated using a Mann-Whitney U test. Triangles indicate calculated data, derived from immunoassay values to replace missing values from the LC-MS/MS method.
