Properties: Vitamin D3 is also called the vitamin of the sun, as the human body manages to synthesize it in the skin, upon contact with the sun's rays. A daily exposure of 10-15 minutes is sufficient for synthesis, during which the vitamin produced under the effect of the sun's rays can cover up to 80% of the daily requirement. In order to provide the body with a sufficiently large dose of vitamin D, a long exposure to the sun is not needed. A few hours of sitting at the beach during the summer vacation does not increase the amount of vitamin D in the skin. Despite the fact that our body absorbs vitamin D under the influence of the sun, the resources obtained in this way are quickly exhausted. Recent studies have shown that the deficiency of vitamin D3 is correlated with the development of certain diseases and is seen as a risk factor for their occurrence, namely autoimmune diseases, metabolic diseases, cardiovascular diseases, hypertension, diabetes of the first and second degrees. Vitamin D deficiency also increases the risk of diseases with an autoimmune substrate, that is, those diseases in which the immune system turns against the cells the body. Moreover, it plays an indispensable role in the bone mineralization process. Vitamin D deficiency limits the absorption of calcium, even when our diet provides sufficient amounts of this mineral. The effects of vitamin D deficiency are dangerous for young children (risk of rickets), whose bone system is still developing, but also for the elderly (risk of osteoporosis), who are over 65 years old and whose ability to absorb calcium from the digestive tract is low, and the skin synthesis of vitamin D is insufficient. Ingredients: 1 320 mg tablet contains: 50 µg (2000 IU) vitamin D3 (1000 %*) Method of administration: 1 tablet per day. Presentation: 60 + 30 film-coated tablets