It is recommended to apply two to three times a week. It is a product used for nutritious, durable and hard nails. This product helps to prevent the nails from breaking by laying them in layers. In addition, keratin strengthens the layer and allows the nails to grow in a healthy way. It is quite simple to use, it is recommended to apply one or two floors to the dry and clean nails. It is recommended to use two or three times a week. Kalyon nail hardener and nourishing is a product that protects and strengthens nail health.