I bought this for my husband who chews his nails so badly that he is in constant pain. During high stress times it’s worse so with the pandemic and political unrest and all of the stresses in the world, he’d reached a point where we needed a solution fast. We gave this a shot and within a couple of weeks of constant use, he has nails that come to the end of his natural mail bed, and almost a little extra!! He is proudly showing me his nail growth progress every day and I’m proud that he has been diligent about reapplying this as often as needed. I tried it out myself despite not really needing it, and I must say, this WILL train you to keep your fingers out of your mouth! Great training tool for adults and kiddos who need an extra reminder (especially during COVID times) to keep hands away from your mouth— the bitterness is truly day-ruining and a great deterrent! It’s potent and lasts as long as the polish does, but of course this chips and flakes off like any other regular clear polish, so it’s important to remove and reapply every few days until the habit is broken. This will take diligence, patience and hard work, so not a miracle cure, but a great tool for those willing to put in the effort. I love that it’s clear so my husband doesn’t think twice about wearing this on his hands, but it does make it tough to tell where it’s been applied and where it needs reapplying. You just have to get into a routine with it.