All the hair you’ll ever have on your head is determined at birth. That’s because hair
grows from a root in your scalp and the number of roots cannot be changed. Each hair
grows from the root to a certain length depending on your unique genetic makeup, then
slows down, then stops naturally. At some point, it’ll die and be shed. You lose about 100
hairs every day from this life cycle. The lost hair will be replaced by a new-growth shaft.

You can help make your hair grow longer by taking good care of each shaft: gentle
brushing, using a mild shampoos, giving your self gentle scalp massages regularly, and
limiting coloring and perms. You can increase the volume of individual hairs, and thus
make your hair appear more full, with protein shampoos and conditioners that coat each
shaft.

Your hair is mostly made of water. To be shiny and supple, your hair needs to be
adequately hydrated. Oil from your scalp coats each shaft and acts as a barrier against evaporation. Your hair also needs proper blood circulation to remain strong, which can be increased with brushing and scalp massage.

If you wear your hair pulled back in a French Twist or ponytail, give your hair a break once
in awhile by letting it hang freely. Don't wear the hairstyle that put a lot of pressure on your hair.

Don’t use any uncoated elastic bands in your hair! Elastic grabs at the shaft and will break it.

Don't brush wet hair because the structure is more fragile at that time.