Nails are composed of a protein called keratin. Fingernails grow fast, about 1.2 centimeters in a month they grow from the area at the base of the nail under the cuticle. As new cells grow, older cells become hard and compacted and are eventually pushed out towards the fingertips. Healthy fingernails are smooth, without pits or grooves. They're uniform in color and consistency and free of spots or discoloration.

Nails often reflect our general state of health. Changes in the nail such as discoloration or thickening can signal health problems like liver and kidney diseases, heart and lung problems, anemia and diabetes. Keeping the fingernails looking their best does require regular care along with manicures. Cuticles should be moisturized and groomed and nails should be trimmed, filed and protected.