Extremely bitter taste reminder to stop nail biting habit Bitterness Protection: Natural bitters are used to form a bitter protective film after application, when the finger touches the mouth, the strong bitter taste will immediately remind the user to stop nail biting behaviour. Scientific and effective: Laboratory and market tests have confirmed its safety and effectiveness, and it can be used by children and adults to help quit nail biting habit. Safe for human consumption, mild and non-irritating Natural Ingredients: Plant-based bittering agent, no benzene, acetone and other harmful chemical additives, safe for consumption, even if accidentally ingested, will not cause harm to the body. Slow-release film-forming technology: The slow-release film-forming technology ensures that the bitter flavour lasts for more than 8 hours and does not come off when washed, providing long-lasting nail protection. Multi-functional, nail care Anti-biting nail care: Not only preventing nail biting, but also protecting nails from external damage and reducing nail breakage and ingrown nails caused by nail biting. Nail care: Some anti-biting nail polishes are also enriched with a variety of vitamins and plant nutrient oils, which can moisturise the skin around the edge of the nails, care for the nail bed, and promote the healthy growth of nails. Easy to use, widely applicable Easy to use: Apply to nails as normal nail polish, dry to form a protective film without complicated steps. Multi-scenario application: suitable for nails, lips, clothing, small toys and other locations where children are not allowed to lick and bite, can also be used for adults to quit the habit of nail biting.