Devital Direct 2000 is formulated based on vitamin D3, quercetin, selenium and acerola fruit extract as a natural source of vitamin C. Vitamin D3 is a liposoluble vitamin necessary for proper bone development and mineralization and maintenance of normal blood calcium levels. Vitamin D3 has an immunomodulatory effect and fewer infections have been found in humans on this vitamin supplement. Quercetin is a bioflavonoid that can exhibit antioxidant, anti-inflammatory, immunomodulatory, antiviral and anti-allergic effects. The anti-allergic effect of quercetin is based on its ability to block the synthesis and release of histamine and thus facilitate the body's reaction to allergens and reduce the unpleasant symptoms characteristic of allergies. Selenium is an essential trace element that contributes to the proper function of the immune system, participates in the protection of cells from oxidative damage, as well as in the regulation of the metabolism of thyroid hormones (thyroid hormones). Its use in practice is common in diseases of the thyroid gland (its hypofunction) or in patients whose thyroid gland has been surgically removed. Acerola is one of the richest natural sources of vitamin C. vitamin C contributes to normal function of immunity and nervous system, normal psychological function, reduction of fatigue and exhaustion, creation of collagen which is necessary for the function of bones, cartilage and blood vessels. Acerola is also a natural source of bioflavonoids, which have a beneficial effect on the bioavailability of vitamin C. It is recommended to use Devital Direct 2000 in: A person with impaired function of the immune system Osteoporosis Myopathies Autoimmune diseases of the thyroid gland Allergy People who are insufficiently exposed to sunlight