To grow long nails naturally, take biotin supplements, avoid nail hardeners, limit professional manicures and avoid harsh chemicals such as cleaners and acetone nail polish removers. Improving the health and strength of your nails allows them to grow longer without cracking, splitting or breaking.
Biotin supplements seem to thicken nails, making them less likely to split or break. A daily dose of 2.5 milligrams shows benefits for most people.
Nail hardeners aren't beneficial to most people, instead making nails unnaturally hard and more brittle and susceptible to breakage. Professional manicures may dry the nails and make them more brittle. Infections that affect the health of the nails can also occur with professional manicures. Acetone in many nail polish remover products also strips nails, making them brittle and susceptible to breakage.