Human epidermal growth factor (EGF) protein is a naturally occurring protein that plays a vital role in cell growth and development. It is produced and released by various cells in the body, including the skin, salivary glands, and kidneys. human EGF protein is a vital protein in the body that plays a crucial role in cell growth, tissue regeneration, and overall health. Its inclusion in various skincare products has made it a popular ingredient in the pursuit of healthier and more youthful-looking skin.