What is it? Biostimulatory injectables (e.g., poly-L-lactic acid, calcium hydroxylapatite) that enhance collagen production to restore skin volume and elasticity.

Discovered: First used in the 1990s for medical applications, with aesthetic uses popularized in the 2000s.

Applications: Stimulates natural collagen production to improve skin elasticity, texture, and volume over time (ideal for long-lasting rejuvenation).