Fun and Fascinating Facts About Skin, Hair, and Nails

Your skin renews itself about 1,000 times in a lifetime.
Hair is technically dead — but the follicle that grows it is alive and busy.
Fingernails grow faster on your dominant hand.
The average person’s skin hosts more microorganisms than there are people on Earth.
Goosebumps are controlled by the same system that regulates fear.
Your skin turns over faster at night than during the day.
Hair can detect tiny air movements, acting like a built-in sensor.
Nails can reveal iron levels, hydration, and oxygen balance in your blood.
The body replaces about a million skin cells every 20–30 minutes.
Your integumentary system is a masterpiece of protection, adaptation, and expression.