Our nail care serum contains glycerin and acetic acid. It can provide adequate moisture for the nails and strengthen the internal structure of the nails, thus improving the overall strength. Its use is simple: Soak your hands or feet in warm water for 10-15 minutes to soften the cuticles, use a nail file to remove the softened part of your nails, and apply the brush of an essence pen evenly to the cuticles and skin around your nails. Hold for 10-15 minutes and wait for absorption. It can nourish and repair the damaged nail surface, increase the elasticity and flexibility of the nail and reduce the brittleness caused by drying.