children aged 1-10, 2000 IU / day c) children and adolescents aged 11-18: 4000 IU / day Until recently, the recommended daily doses of vitamin D were set at a lower level, however, the latest research determines the above dosed as a safe and equal amount of vitamin D synthesized during solar exposure. Vitamin D in adults - how to deal with its deficiency? Radiant Allure What are the effects of long-term vitamin D deficiency in adults? Lack of this substance can lead to rickets in children, that is, by means of osteoporosis or osteomalacia - a disease that manifests itself in a similar way to rickets in children, that is, by softening bones. In addition, adults may have problems with walking and balancing as well as painful cramps as a result of weakening muscle strength. Vitamin D deficiencies in adults also increase the risk of developing serious lifestyle diseases, eg obesity, diabetes, hypertension, inflammatory and autoimmune diseases, and cancer. Vitamin D deficiencies can also accelerate the aging process of the skin and the whole body. How to deal with insufficient vitamin D levels? We can try . http://supplementsrevolution.com/radiant-allure/