Close-up of a person's eye and part of their face. The individual is holding a dropper releasing a drop of yellow liquid onto the skin near the eye. The skin around the eye shows fine lines and wrinkles. The background is blurred, focusing attention on the eye and dropper.

Learn About Skin Immunity And Probiotics

Your skin has an immune system, and it is vital in that it protects you from pathogens Keratinocytes, the most common skin cells in the epidermis (the outermost layer of…