Firm aging skin with StriVectin Multi-Action Active Infusion Youth Serum. StriVectin Multi-Action Infusion Youth Serum is a multi-tasking formula that helps firm, smooth and plump aging skin. With each pump, the spheres suspended in this unique serum release a sophisticated anti-aging cocktail to rejuvenate the complexion. StriVectin’s exclusive NIA-114 molecule works to inhibit environmental stressors. Collagen- and elastin-enhancing peptides, plus lipids and antioxidants derived from algae, help infuse skin with revitalizing nutrients for a healthy glow.