This article deals with the biological effects of vitamin d and quercetin. The article presents the results of a study on the pleiotropic effects of quercetin and vitamin D, which are most often used in geriatrics and are included in standardized treatment regimens. During the study, it was proved that the potential biological activity of quercetin is due to capillarostabilizing, antioxidant and anti-inflammatory effects in cerebrovascular disorders, and the potential biological activity of vitamin preparations is due to antioxidant, neuroprotective and anti-ischemic effects in cerebrovascular disorders.