Glycerin

Both glycerin and hyaluronic acid are effective humectants, meaning they draw water into the skin and help retain moisture, leading to improved hydration and a smoother, plumper appearance. Glycerin has smaller molecules and penetrates deeper, while hyaluronic acid has larger molecules and works primarily on the surface, hydrating and plumping the skin. It protects the skin from microorganisms and irritants, repair damaged skin, acts as a moisturizing agent.