Vit. D3 + Magnesium is a combination of vitamin D3 and magnesium citrate. The correct supply of these two micronutrients helps in: maintaining healthy bones and ensuring normal functioning of the nervous system and muscles.For a long time we have been paying special attention to providing the right amount of vitamin D in our diet. Newborns in maternity wards receive 400 IU of vitamin D from the first days of their lives. Breastfeeding women leaving the hospital with their little ones are also reminded to introduce an appropriate portion of vitamin D in their diet. These are the most important functions of vitamin D, due to which in fact every age group requires a daily portion (500 - 2000 IU) of the vitamin:Vitamin D helps in the normal absorption of calcium and phosphorus, which determine the condition of the skeletal system, teeth and their proper mineralization.Vitamin D helps in the normal functioning of muscles.Vitamin D helps in the normal functioning of the immune system.Vitamin D3 can be produced by humans on their own, because almost 80% of it is formed in the skin as a result of the transformation of cholesterol under the influence of sunlight. However, during the period of reduced exposure to the sun, and due to air pollution, the body may not be able to synthesize enough of the vitamin. Diets based on low consumption of fat, which is the best carrier of vitamin D, such as vegetarian diets for example, may also be low in vitamin D. When we are not able to get enough vitamin D from our food we can make up for it with food supplements.