Close-up of a woman's face focusing on her green eye with a dropper dispensing a drop of serum or oil near the eye area. The skin around the eye appears smooth, and the woman has a natural look with minimal makeup.

Probiotics and Skin Immunity

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…