Human skin darkest brown to the lightest pinkish-white hues. Human skin shows higher variation in color than any other single mammalian species and is the result of natural selection. Skin pigmentation in humans evolved to primarily regulate the amount of ultraviolet radiation (UVR) penetrating the skin, controlling its biochemical effects. The actual skin color of different humans is affected by many substances, although the single most important substance determining human skin color is the pigment melanin. Melanin is produced within the skin in cells called melanocytes and it is the main determinant of the skin color of darker-skinned humans. The skin color
Baumann Skin Types keep allergens and irritants out. Sensitive skin often reacts to skincare products with redness, stinging, burning or acne, while resistant skin rarely experiences negative side effects. The strong stratum corneum associated with resistant skin can make the skin resistant to the beneficial effects of skincare ingredients due to less absorption. There are 4 unique subtypes of sensitive skin, and they are all different, all sensitive subtypes have inflammation in common. This skin attribute is measured by the skin’s tendency to develop unwanted pigment. This can be sun-induced, as in melasma, solar lentigos and freckles, or due to injury in the