NailTek Citra Formaldehyde Free 2 is one of 3 options in the Citra Nail Strengthening system. Citra 2 is a formulation designed for those with soft, thin or peeling nails. NailTek Citra Formula 2 seals peeling layers of the nail back together and acts to reinforce and thicken the existing nail while providing the necessary therapy to promote growth, strength and flexibility. Citra Formaldehyde Free 2 uses pure citrus to provide additional strength to your nails, without the damaging effects of formaldehyde. NailTek Citra is clinically proven to develop stronger, more flexible nails with daily use- the safer, natural way!