On the other hand, de Oliveira et al. (2018) [159] found no association among the four polymorphisms on the VDR gene (BsmI, ApaI, FokI and TaqI), cognitive deficits and reduction in vitamin D levels in patients with AD and MCI; however, BsmI polymorphism was associated with vitamin D levels in individuals with cognitive decline. The gene discussed is VDR; the disease is Cognitive impairment.