Skin is your body's largest and most complex organ and its primary contact with the world. When surface conditions dry your skin, water is drawn from the dermis into the epidermis, then out the stratum corneum . The shortest path from the surface into the dermis is through the skin's hair shafts and sweat pores. Your skin's natural pH balance, between 5.5 and 6.5, is slightly acidic while the pH of most of Earth's water is above 7.00, making it slightly alkaline and incompatible with the pH of human skin. Human skin is acidic because of the acid-mantle protection barrier, which protects the skin from harmful substances, including bacteria and alkaline water.
Alkalinity dries the skin and bacteria thrive in alkalinity.
For all ages, sexes and skin types. Over time, chronic dehydration results in the appearance of fine wrinkle lines. As you age, the need for added external water increases. Teenagers , on the other hand, tend to have extremely oily skin which is prone to infection. Sebaceous glands are underactive in older people and overactive in younger people.