The natural nail experts. Intensive Therapy's unique protein formulation helps weak, thin, soft or peeling nails by sealing the layers of nail together. With each application, intensive therapy 2 reinforces and thickens nails while promoting strength and flexibility. Further information included. Treat by Type: Nail Tek products were developed to help the appearance of growth and keep healthy, strong, natural nails. Whatever the condition of your nails, Nail Tek has a personalized solution for you. As nails improve, continue to the next appropriate formula. Use our Treat by Type number guide to easily identify the perfect products for your nail needs. 1. Normal, Healthy. 2. Soft, Peeling. 3. Hard, Brittle. 4. Weak, Damaged. Made in USA.