Isdin Si-Nails Nail Strengthener helps strengthen, protect and care for nails naturally. With a combination of cationic hyaluronic acid, mastic pistachio oil, and organic silicon, for a hydrating, stimulating, fortifying, and soothing action. Strengthens nails Improves and maintains the natural hydration of the nails. Stimulates the synthesis of hard keratin and proteins for thicker nails Restructures and prevents nail breakage Improves the growth and qualities of nails. Easy to apply Invisible finish Visible results in 14 days Ideal for fragile, weakened and brittle nails. Leaves nails stronger, protected and healthier