As demonstrated in Table 2, there are several VDR polymorphisms implicated in nutritional rickets, with the most studied polymorphisms occurring in intron 8 (Bsm I (b alle) and Apa I sites), exon 9 (Taq I site), the 3′untranslated region (3’UTR), and exon 2 (Fok1 site) (48). Here, VDR is linked to rickets.