Which component is primarily broken down by TCA peels?

TCA peels, or trichloroacetic acid peels, primarily target the outer layers of the skin, specifically affecting the epidermis and upper layers of the dermis. The primary component that TCA peels break down is keratin. Keratin is a fibrous protein found in the skin, hair, and nails, and it plays a crucial role in skin structure and barrier function.

During a TCA peel, the acid induces controlled damage to the skin, stimulating exfoliation and promoting a renewal process. This often results in improved skin texture, tone, and overall appearance. By breaking down keratin, TCA peels can help remove the top layer of dead skin cells, allowing for better penetration of other treatments and encouraging the production of new, healthier skin cells.

While collagen, hyaluronic acid, and elastin are also vital components of the skin, they are not primarily broken down during TCA peels. Collagen and elastin are structural proteins that provide strength and elasticity, whereas hyaluronic acid is a moisturizing agent that helps retain water in the skin. TCA peels primarily focus on keratin to achieve their exfoliating and rejuvenating effects.