Here's why:
* Hair Growth Cycle: Hair grows in cycles. Each hair follicle has a lifespan, and the color of the hair is determined by the amount of melanin (pigment) produced. Pulling out a hair simply disrupts the growth cycle of that specific hair, it doesn't change the follicle's melanin production.
* Genetics: The graying of hair is primarily determined by genetics. As we age, the hair follicles gradually produce less melanin, leading to the appearance of gray or white hair.
* Stress & Other Factors: While stress and other factors can sometimes temporarily accelerate the graying process, they don't directly cause more hair to grow.
So, rest assured, pulling out a white hair won't make more appear! 😉