I don't know what it is about this product. It hasn't gotten me to stop biting totally (in fact, I actually find that I pick my cuticles a little bit more, though maybe that's just stress), but my nails are the healthiest and best they've looked in about twenty years even with some picking. I have certain nails that have been especially awful (if you are a nailbiter, you know what I mean - the ones you have kept hidden from people for so long that it's something you do subconsciously) and while the treatment hasn't totally fixed these problems (IDK if there is ever going to be a fix for the damage I've done, sadly), they do make them look passable which feels great. The product doesn't have a particularly bad taste, and while there is a noticeable smell I wouldn't say that it's so bad that that's why I bite less, but there is something about this product that gets me to stop. I had first purchased my bottle at a Walmart and used it to the last drop - not wanting to go into a store at the moment, I'm glad I can find it here and will continue to use it.If you're like me, you've read fifteen similar reviews for fifteen different products, ordered them all, and had no success. I'm here to tell you that there's hope for you, and for me, it started with this.