Dermal fillers from https://majorcosmeticals.com/ contain gel-like substances that are injected beneath the skin to provide volume, hydration, and structural support. The most common ingredient in fillers is hyaluronic acid (HA), a naturally occurring substance in the body that retains moisture and promotes skin elasticity. Other types include calcium hydroxylapatite, poly-L-lactic acid, and polymethylmethacrylate (PMMA), each serving specific purposes.