Hair now, tomorrow no more.
Why does your hair gray and fall out as you become older? To answer those questions, you must first grasp some hair fundamentals.
The follicle and the shaft are the two sections of hair. Hair follicles are located beneath the skin's surface. The hair shaft is what we often refer to as a hair strand.
Facts to remember: The hair shaft is mostly made up of dead cells that include the protein keratin (found in nails, feathers, claws, and hooves) as well as the pigment melanin, which gives hair its color. The water content of each shaft ranges from 10% to 13%.
You are born with the greatest amount of hair follicles that you will ever have. You don't get any bigger as you get older. This amounts to 100,000 to 150,000 hair shafts for the normal person.
So, what's the deal with the graying and balding? It all comes down to heredity, diminishing hormones, and growing older. These factors eventually cause hair follicles to stop generating pigment (which causes graying) or stop producing hair altogether (leading to balding). Men's heads can range from heavy salt-and-pepper to Mr. Clean due to the speed and harshness with which this occurs.
The final line is that you can't stop your hair from changing. It'll do exactly what it's destined to do.