How can u stop/slow growth of grey hair once u get it?

~The only two things you can do is tint it, the salon can do this, or you can do it yourself. It's not uncommon for men to have this done.

The only other way is to shave it off. If I were you, I would go with the first option. I'm going to have to start tinting mine within a couple years myself.~

How can u stop/slow growth of grey hair once u get it?

well, you could die it???