The BCL Nail Support Na is a Japanese nail strengthening treatment that functions as both a base and top coat. This quick-drying formula contains diamond powder and five moisturizing ingredients to create a protective barrier that reinforces weak, brittle, or splitting nails. The clear coating provides a glossy finish while preventing breakage and peeling. Key features include a reinforcing polymer coating, crystal polymers for shine, and moisturizing ingredients like silk extract and panthenol. It's particularly beneficial for those with weak nails, those taking a break from gel manicures, or anyone looking to grow stronger, healthier natural nails.