Scientists have discovered more than 470 SNPs in the VDR gene, and thoroughly studied the role of four SNPs, rs2225870, rs1544410, rs7975232 and rs731236, in the pathogenesis of different diseases (cancer, diabetes, Parkinson’s disease, myocardial infarction and CAD) [52,53,54,55]. The gene discussed is VDR; the disease is Parkinson disease.