If you subject your nails to frequent polishing - or even if you don't - it is important to take good care of your nails and cuticles. Nail treatments are a great way to do this. Nail hardener and nail strengthener are nail polish treatments that are formulated with proteins to encourage healthy nail growth and encourage the protein chains to form tighter chemical bonds to make nails harder and more durable. Sally Hansen Hard as Nails is a popular option. Cuticle oil is another product that you can benefit from. Cuticle oil is essentially a moisturizer for your cuticles and nails, and helps restore oils lost when you frequently apply polish and remove it using harsh nail polish removers. Cuticle oil is also great to use if your hands are frequently exposed to water or cold temperatures, which can cause dryness, cracking, and similar damage. Keep in mind that dry, brittle, or cracked nails and cuticles can also be a sign of a vitamin deficiency. If you notice the issue and are concerned, talk to your doctor and consider picking up some hair skin and nails vitamins as well.