Add shine and thicken nails up to 50% after one use with this powerful formula designed to fortify and protect your nails with ProSina, a groundbreaking formula that delivers powerful protein Peptides directly to the nail bed to help stimulate growth even in stubborn, hard-to-grow nails. This unique ingredient is extracted from wool, yielding age-defying, softening and strengthening results for nails and hands. This fast-drying treatment contains a UV absorber to keep polish colors from fading and yellowing. Use as a top coat for strong, glossy nails.Due to legal requirements, we cannot ship this product to Alaska and Hawaii.