Key ingredients: - Provitamin B5: Nail elasticity is linked to the water storage capacity of nail keratin. Provitamin B5 helps increase significantly this water storage capacity, improving therefore nail flexibility and strength. - Oligoelements: Silicium is an essential mineral for the overall nail wellbeing, especially for soft and brittle nails. Calcium is also important for healthy nails. Without it, nails lose their strength and become brittle and dry. Zinc is essential for keratin synthesis and collagen production, supporting tissue growth. Iron deficiency can make nails fragile and brittle. Keratin is rich in sulfur which contributes to strong and rigid nails, thus an essential nutrient especially for weak, flaky and prone to breaking nails. Dermatologically Tested.