Before diving into the amazing world of acids and enzymes, it is important to have a grasp of skin’s anatomy and physiology. Skin is the body’s largest organ and is composed of water, protein, fats, and minerals. Every inch of skin on the body contains approximately 19 million skin cells, 60,000 melanocytes, 1,000 nerve endings, and 20 blood vessels. As a part of the body’s integumentary system, it helps to protect against environmental hazards and germs, regulates body temperature, and allows the feeling of sensations like hot and cold. Most aestheticians only work with the epidermis, but it is important to discuss all three layers of the skin.

Alex Hernández, a licensed esthetician since 2016, serves as the clinic manager and lead educator at the Face Reality Acne Clinic in Danville, California. Hernandez has trained alongside Laura Cooksey, owner and co-founder of Face Reality Skincare, a nationally recognized acne expert with 28 years of experience in educating professionals on safe and effective acne treatment. Hernandez became a Face Reality Certified Acne Expert in 2018 through diligent practical training and Cooksey’s online course.