I've been shaving my head bald for years.
Not because of thinning hair..........but gray hair.
Don't even know how much I have now, but I only shave my head on the weekend.
By Friday, I can see specs of gray from what grows back.
If I let it grow back altogether, I'd look about 10 years older than I am.
When I'm bald though, people think I'm still in my 30's.
So, having said all that, I wouldn't put all those chemicals in my head.
Just shave it bald if it gets too bad.