Zinc is a mineral that is particularly prevalent in skincare and haircare products. Its concentration is restricted in Europe according to cosmetic regulations to 1% zinc in the final product. Zinc is present in more than thirty cosmetic ingredients, some of which are more controversial than others and have a variety of functions (antimicrobial, surfactant, foaming agent, pH regulator...). At Typology, we primarily use the zinc PCA, a gentle active ingredient that is non-controversial and tolerated by all skin types.