Arginine is an amino acid commonly utilized in cosmetics and skincare products for its various benefits. It is an essential building block of proteins and plays a vital role in maintaining the skin's health and function. Arginine helps support collagen synthesis, promoting skin elasticity and firmness. It also aids in improving skin hydration and barrier function. Additionally, arginine works in synergy with lysine, another amino acid, to enhance the skin's natural defense mechanisms and support wound healing.