Will a Hair Wash Grow Abundant Hair?

My friend says it will.

Photo by Elijah Hiett on Unsplash

A tablemate says a weekly washing of her hair by our professional in the Hair Salon has given her hair a fuller and more glorious head of hair.

She said her hair was thinning. Now it is full-thick and growing.

I talked to the Salon owner, and she denies this. No one in their sane mind would claim they can grow hair.