Buxom's Plump Shot Collagen-Infused Lip Serum features clinically proven plumping without the pain. This cooling lip plumper is packed with collagen, peptides and moisturizing oils for your plumpest pout ever. With Buxom's most advanced plumping technology, it's clinically shown to plump lips by 18% and smooth the appearance of lip lines and wrinkles by 34%, for softer and healthier-looking lips over time.