Abstract

Objectives: 1, Understand the four “pillars” that define skin quality. 2, Comprehend the synergistic mechanisms of biostimulators and hyaluronic acid (HA), and how their complementary effects improve skin. 3, Propose evidence-based, personalized treatment protocols based on patient needs and communication for optimal outcomes. Introduction: Skin rejuvenation is one of the most common aesthetic requests. “Skin quality” is a multidimensional concept underlying a youthful, attractive appearance. There are many minimally invasive options available, but combining modalities (such as biostimulators and HA) may deliver more comprehensive results. Materials / method: The four pillars of skin quality are defined as:   a. Firmness – elasticity, tautness / tightness, hydration.   b. Tone evenness – pigmentation, erythema / discoloration.   c. Surface evenness – pore size, crepiness, fine lines / wrinkles, acne/scarring.   d. Glow – radiance, luminosity, brightness. Biostimulators (such as PDLLA / PLLA) work by stimulating new collagen and elastin formation, remodeling dermis over months. HA provides hydration and improves viscoelasticity of the extracellular matrix. Results: HA skin boosters are best at improving hydration, immediate plump, smoothing fine lines and improving tone and glow. Biostimulators (PDLLA / PLLA) provide longer term remodeling: increase dermal thickness, improve firmness, regeneration of collagen/elastin. When used in combination, HA can address surface / hydration fast, while biostimulators sustain deeper structural improvements. Timing/sequencing matter (e.g. HA first or concurrently in some treatment zones, PDLLA in deeper areas or in subsequent sessions). Conclusion: To achieve smoother, tighter, more radiant (“glowy”) skin, a combined protocol using HA skin boosters plus biostimulators (e.g. PDLLA) offers superior results versus single modality. Key to success: assess baseline skin quality across the four pillars, identify which pillars are deficient, then tailor the combination (product choice, volume, timing). Proper injection technique, dilution / reconstitution (for PDLLA), patient communication about expected timeline (immediate vs delayed improvement), and safety monitoring are essential.