The organic dietary supplement HUMAC® Nativ with vitamin C + Se is made on the basis of activated natural humic substances with a high amount of humic acids, obtained from Leonardite and processed with a special technology, the so-called activation. Humic acids help support the activity of immune system cells and can prevent various viruses from multiplying. They stimulate the receptors of the immune system and are a natural source of easily available essential minerals and trace elements. We increased the effectiveness of the effects of activated natural humic acids by adding two of the main components supporting the immune system - vitamin C and selenium. In combination with vitamin C and selenium, they also support the normal function of the immune system and energy metabolism. It also contributes to the protection of cells against oxidative stress, which is generally understood as a manifestation of the body's imbalance and an event accompanying natural aging. In addition, vitamin C contributes to the reduction of fatigue and exhaustion, to the proper formation of collagen and to the proper function of the skin. Selenium, on the other hand, contributes to the proper functioning of the thyroid gland, which is the center of hormone production, and to the maintenance of healthy hair and nails. The natural humic acids in the product have various beneficial effects on the body besides supplementing micro, macro and trace elements, extensive antiviral and anti-inflammatory properties, and increase in iron resorption, such as offering protection from oxidative stress.