Collagen is a natural protein found in the body that gives skin its youthful appearance and plumps it up, keeping it firmed and toned. With ageing, collagen production begins to slow down and it loses its elasticity meaning skin starts to sag downwards. Ultherapy at Cadogan Clinic kick starts a repair by stimulating the body’s natural response to the heating of the tissues by the focused ultrasound energy, promoting collagen-building. The ideal facial skin tightening treatment.