If never cut how long will healthy hair grow in a lifetime?

Answer 1

This can vary a great deal. Each person's hair grows at different rates, and the hair itself has a lifespan.

A hair folicle produces a hair for a certain period of time, and the releases the hair, takes a break, and starts a new one. For some people, their hair will never get more than two or three feet long. We think of this as the hair growth stopping, but actually it means that for that person, this is the maximum length of a single hair before it is released. For other people, the hair can reach well over the length of their bodies.

At an average of one-half inch per month, a person who lived 70 years could theoretically grow 35 feet of hair but it's unlilkely the inidvidual hair shafts would last that long.