Seems to work for my 10-year old daughter. She has reduced the amount of times she is bitting. It seems to wear off after a few days, so you do have to apply regularly.

Always unconsciously bite and pick my nails when I’m stressed and have tried a few different polishes and sprays but this is the only one that works for me. Other brands wash off after washing your hands whereas this stays on like a proper polish and the taste is also very strong so you’d immediately stop biting. Was trying to stop biting my nails for over a year before trying this product and made so so much progress immediately after trying this. Always rebuy when I fall back into old habits of nail biting. 

Only bought this recently, so only used once on my daughter who has a nail biting habit. The product works as it should: very bitter taste even after washing hands/showering, we will apply regularly and am hopeful that it will help break the habit 

This works brilliantly if your looking to grow your nails definitely try this

When used daily, this definitely stopped my daughter biting her nails as the taste is so bitter. It also stopped her eating with her fingers as the taste is so powerful. However, she then developed a habit of picking her nails instead. If you want to simply stop nail biting then it is an excellent product when reapplied frequently.