Climbing is becoming an increasingly popular sport. Therefore, indoor climbing facilities are also frequently visited. To improve friction between the hands and the holds, athletes apply magnesia alba [Mg5(OH)2(CO3)4] on their hands. It is available in various forms. The most commonly used form – powdered – is stored in a bag attached to the waist. Unfortunately, a lot of dust gets into the air during its application. Although data on the harmfulness of the compound itself is not entirely clear, there are reports of a deterioration in the function of the respiratory tract due to magnesium dust suspended in the air. Therefore, methods of reducing the pollution of climbing objects were sought. One of them is certainly the replacement of the powdered form of magnesia with its liquid form (suspension in ethyl alcohol). Because of the constant exposure of the skin to magnesium hydroxycarbonate, its impact on the user’s health has also been analyzed. It has been shown that the effect of magnesium dust at the cellular level can lead to skin pigmentation changes. A separate issue raised in the study is the influence of magnesium on the course of atopic dermatitis. The need for further research has also been underlined, as it may provide new information on the effects of magnesium on atopic skin as well as on the development of contact allergy. Another problem is the increased risk of colonization of magnesia bags by pathogenic microorganisms. In view of that, the study highlights the importance of respecting the rules of personal hygiene in the prevention of infections that threaten people practicing sports climbing.