If u just have like a few pints of john smiths daily will that come back in your hair strand test as heavy usage and how long will it stay in your hair for?
medic-dan
Oct 12, 2013, 11:08 AM
What's a "few" pints?
It stays in your hair until it is cut off. They can go back for months.
"Heavy use" is a subjective term. I would consider a "few pints daily" heavy use.