Mumio (sometimes called shilajit) is a natural substance found in mountain regions, composed of plant matter and minerals that have decomposed over centuries. In this product, it is included as one of several ingredients in a balm intended for "tired, overworked or vulnerable skin" because it "helps keep the skin surface in better condition." Its traditional use suggests it contributes minerals and may support the skin's overall resilience, working alongside other components like sea buckthorn oil and panthenol.
Regarding safety, the product is formulated for irritated skin and includes soothing ingredients like plantain extract. However, any cosmetic product can potentially cause a reaction in individuals with specific allergies or highly sensitive skin. The product notes advise to "check tolerance first if your skin is very reactive." A prudent approach is to apply a small amount to a discreet area (like the inner forearm) and wait 24 hours to observe any redness, itching, or discomfort. If you have a known allergy to any of the listed ingredients or a history of severe skin reactions, consulting a pharmacist or dermatologist before use is wise. The balm is not intended for use on deep wounds or oozing skin.