Does acetone help with thinning hair?

Acetone will not help with thinning hair. It would likely irritate your scalp and skin.  It would likely cause hair loss more than hair growth.

No, acetone does not help thinning hair. It can however cause irritation and hair loss. Acetone is not a direct hair loss treatment.

One of the old waves tales is the oils on the scalp plug pores which damage hair growth. This no absolutely not true.