Nails are an important part of our body and serve many purposes beyond just looking good. Here are ten interesting facts about nails that you may not know.

  1. Nails are made of keratin: Nails consist of a layer of protein called keratin, which is the same substance that the body uses to produce hair and upper layers of skin ³.
  2. Fingernails have four main parts: Along with skin and hair, nails are part of the body’s integumentary system, whose main function is to protect your body from damage and infection. Fingernails have four basic structures: the matrix, the nail plate, the nail bed, and the skin around the nail (including the cuticle) ¹.
  3. Nails grow at a rate of 0.1 millimeters a day: That’s about 3 to 4 millimeters per month. But they don’t always grow at the same speed: Fingernails grow more quickly during the day and in summer (this may be related to exposure to sunlight, which produces more nail-nourishing vitamin D). Nails on your bigger fingers also grow faster, and men’s grow faster than women’s. The pinky fingernail grows the slowest of all the fingernails. According to the American Academy of Dermatology, if you lose a fingernail due to injury, it can take up to six months to grow back (while a toenail could take as much as a year and a half) ¹.
  4. Nails do not sweat: It is the fingers that sweat, not the nails ³.
  5. Nails can reveal health problems: Changes in the color, texture, or shape of your nails can indicate underlying health problems. For example, yellow nails can be a sign of a fungal infection, while white spots can indicate a zinc deficiency ¹.
  6. Nails can be used to determine your age: Just like tree rings, nails can reveal your age. The growth rate of nails slows down as you get older, so the width of the nail plate decreases ¹.
  7. Nails can be used to determine your occupation: The shape and condition of your nails can reveal your occupation. For example, musicians and athletes tend to have shorter nails, while people who work in manual labor jobs have longer nails ¹.
  8. Nails can be used to determine your social status: In ancient times, long nails were a sign of wealth and status. People who had to work with their hands had short nails, while the wealthy could afford to have long, well-manicured nails ¹.
  9. Nails can be used to determine your personality: According to some studies, the shape of your nails can reveal your personality. For example, people with square nails are thought to be practical and logical, while people with almond-shaped nails are considered to be creative and artistic ¹.
  10. Nails can be used to make music: Believe it or not, nails can be used to make music. Nail tapping is a technique used by some guitarists to create a percussive sound while playing ⁵.

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Source:
(1) 12 Interesting Facts About Nails That You May Not Know Yet. https://www.beautybigbang.com/blogs/reviews/12-interesting-facts-about-nails-that-you-may-not-know-yet.
(2) 11 Facts About Fingernails | Mental Floss. https://www.mentalfloss.com/article/541119/facts-about-fingernails.
(3) 25 Fascinating Facts About Fingernails – Desert Hand Therapy. https://deserthandandpt.com/25-fascinating-facts-about-fingernails/.
(4) 6 Interesting Facts About Nails – Facts Ghost. https://factsghost.com/6-interesting-fact-about-nails/.
(5) 50 Interesting and Mind Blowing Facts About Nails – Oddlyhacks. https://oddlyhacks.com/interesting-facts-about-nails/.