EXCIA | SERUM DAILY CARE ETERNAL KEYSTONE SERUM Sharpens facial line and makes the face slimmer by working on suspensory ligaments that support the skin from deep within, as well as on mimetic muscles and the dermis. Facial features may start to change as we age. EXCXIA Eternal Keystone Serum targets the cause of facial sagging by acting on suspensory ligaments that support the skin from deep within, as well as on the mimetic muscles and dermis to create sharp and beautiful facial features that are both firm and supple. It also melts into the skin to fill it with rich moisture, firmness and elasticity. 40ml How to use Use after Lotion/Toner. Take an appropriate amount (two or three pumps) on the palm and massage onto the entire face.