1) The amount of hair on a person's head varies from person to person. There are around 100,000 hairs on the average human head, with a similar number of hair follicles.
2) Damaged hair appears brittle and straw-like. Split ends and stray, unmanageable hairs come from the hair shaft's fragility and susceptibility to rupture. With minimal movement, it will feel rigid and "crunch" to the touch. Any additional demands placed on the hair while it is in this delicate state can cause severe damage.
3) “When you pluck a hair, a new one grows in its place, and because the pigment cells no longer produce pigment, the new hair will be white as well.” ... Hair follicles can be traumatised by plucking, and repeated stress to any follicle can result in infection, scar development, or even bald patches.”
4) A hair's life cycle can be divided into three phases: anagen, catagen, and telogen. In our lifetime, our hair is renewed 25 to 30 times, with a five-year cycle on average. Given that we will be alive for a total of 125 years, we should have full heads of hair for the rest of our lives.
5) 'A whole head of hair may carry up to 2 tonnes.... Hair is stronger than a copper wire of the same diameter,' according to Kollar's early research.
6) It's typical to lose 50 to 100 hairs per day. Excessive hair shedding occurs when the body sheds significantly more hairs each day.
7) Hair grows roughly 1/2 inch every month on average, according to the American Academy of Dermatology. The hair on your head grows at a rate of roughly 6 inches every year.
8) The discovery of the reactivity of para-phenylenediamine (PPD) with air in the 1860s led to the development of synthetic hair dyes. L'Oréal founder Eugène Schueller is credited with developing the first synthetic hair dye in 1907.
9) The wig was invented by the ancient Egyptians to protect shaved, hairless heads from the sun. They also used beeswax and resin to keep the wigs in place on top of their hair.
10) Innocuous botanicals (calendula, chamomile, henna, saffron, turmeric) to scary tonics prepared from ammonia, lead oxide, lime-water, pigeon excrement, and dead leeches soaked in wine were used to colour Roman women's hair.
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