The active serum with hyaluronic acid, gluconolactone, and lactobionic acid promotes skin renewal and collagen synthesis, reduces wrinkles, and acts against pigmentation and scars. PHA acids work similarly to AHA (glycolic, lactic acid), but due to their larger molecular weight, they penetrate the skin slowly and non-aggressively, thus not irritating not only sensitive and redness-prone skin but even the delicate skin around the eyes. In addition, PHAs have more hydroxyl groups, giving them excellent moisturizing properties and the ability to transfer water molecules to deeper skin layers, making them ideal for renewing very dry and sensitive skin. They also have antioxidant properties and act against skin aging by activating collagen synthesis.