JASON KELVIN / SCIENCE PHOTO LIBRAY JASON KELVIN / SCIENCE PHOTO LIBRAY
Collagen injection. Woman holding the needle of a syringe filled with collagen to her upper lip. Collagen, the body's major structural protein, 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 this protein are only temporary.
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