CC STUDIO / SCIENCE PHOTO LIBRARY CC STUDIO / SCIENCE PHOTO LIBRARY
Collagen injection. Woman having collagen injected into her upper lip. Collagen is the body's major structural protein. Collagen can be injected into and around the lips to produce a more prominent pout (lip augmentation). The collagen fills out the spaces beneath the skin, giving the lips a fuller appearance. The effects of collagen are only temporary.
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