Holika Holika collagen face serum, suitable for all skin types. Collagen, a key structural component of the skin, protects the skin from the absorption and spread of pathogenic substances such as toxins and microorganisms. It gives firmness to the skin, helps with anti-aging, and reduces fine lines. Thanks to its composition, the serum is quickly absorbed and penetrates deeper into the skin compared to face creams, providing anti-aging protection.