Are you a frequent nail bitter? You probably know how bad it is for you without anyone having to inform you. There are clear and colored nailpolish's available at major drugstores that contain ingredients used to combat nail biters. These various ingredients, including cactus extract, taste bitter. You can also buy cremes and lotions for nails that contain bitter-tasting ingredients - use them daily to stop biting habits. Remember: chewed up nails are not attractive.