Background: Vitamin D plays an important role in the prevention of many diseases. More than 1 billion people worldwide suffer from vitamin D deficiency. Vitamin D deficiency can contribute to the development of 16 types of cancer (breast, colon, prostate, etc.), cardiovascular diseases, stroke, autoimmune diseases, periodontal pathologies, transplant failure in endo-alveolar surgery, etc. There are several risk factors that would prevent the achievement of treatment objectives. The national protocol for deficiency rickets prevention privileges vitamin D2 versus vitamin D3, which creates a medical risk factor compromising oral health in both children and adults. The article provides sufficient arguments in favour of vitamin D3 vs vitamin D2 prescription for prophylactic and treatment purposes. Conclusions: Considering that vitamin D deficiency is currently a global public health problem, it can be proposed to declare vitamin D deficit/deficiency a priority public health problem at the national level. Vitamin D3 should be elective in preventing deficit. Taking into account the multitude of acute and chronic diseases related to vitamin D deficiency, in order to improve the status of vitamin D in all population categories, it is necessary to include vitamin D3 in the list of molecules fully subsidized by the state and distributed free of charge at least to children under the age of 5 years and adolescents in the period of intensive growth.