Your body naturally produces collagen protein when you get a scrape or a cut. In youth, collagen production is consistently strong enough to ward off the appearance of lines and wrinkles. This slows down around age 25 and continues to decline with age. Studies have determined that collagen production can be stimulated in a few powerful ways. Ultherapy accomplishes this using micro-focused ultrasound energy. The energy of the targeted sound waves causes a thermal (heating) response in deep layers of tissue. The body sees this warming as an injury so sends collagen to the area to remodel "damaged" tissue. Because there is no true injury, the fresh new collagen that's produced works to firm and sculpt the skin and other superficial tissue.