The purpose of the work is to analyze the literature and our own data on the supplementation of cholecalciferol in the treatment and prevention of hypovitaminosis D in arterial hypertension (AH). taking into account risk factors and combined antihypertensive therapy. The analysis of literature data and the results of a prospective. controlled. https://lockdownsecuritycanada.shop/product-category/keyless-touch-entry-system/