Enriched with Caffeine and Vitamin E to encourage the growth of long and healthy nails, this formula contains an ingredient called Bitrex which leaves a bitter taste in the mouth to cut the urge to bite your nails or suck your thumb. PETA Approved - Cruelty-Free & Vegan Friendly. How to Use: • For best results apply one or two coats over natural nails or nail colour • Re-apply as needed • Encourages nail growth • Prevents nail biting • Caffeine & Vitamin E • Effective bite guard