PCOS and hair loss

I was first diagnosed with PCOS about 8 years ago.  With in the past couple years I have noticed a lot of hair loss.  I can tell that I have less hair now than before but its not as bad for people to notice.  what can I do to treat hair loss or reverse it?  I  just started back on metformin this week after dr appt. 
has anybody tried spearmint tea?