CND Strengthener Rxx is the latest innovation in nail care. A nail treatment formulated with a blend of powerful ingredients, including celery seed extract and Tsubaki oil to strengthen the natural nail, this gentle and quick-drying enamel acts as a protective barrier to help build and repair, leaving nails feeling stronger after only 14 days**. With a breathable vegan formula that is water and oxygen-permeable, CND Strengthener Rxx is a premium treatment that’s perfect for at-home users who struggle with brittle nails and nail professionals to use during their manicure services. Suitable for use at home or in a professional setting. **Based on a 34-person consumer panel