Ok I will list below what I take, I do recommend though doing some research because of the different types of pcos (I have insulin resistant pcos) I highly recommend the group on face book 'healthy PCOS' they started my intrigue into doing some research.
Myo-inositol - 4000mg - highly recommend myova from Amazon it's £32 a bottle and needs topping up monthly, but I have tried other brands and this is the one I see most difference with
N-acetyl-cysteine (nac) - 600mg - again myova from Amazon are good
Vit C - 1000mg
Vit D - 25ug
Vit B complex and B12
Turmeric - good for inflammation of any type
Berberine - (you shouldn't take this long term, so please make sure you read up on this first)
Omega fish oil
Liquorice root - again not a long term supplement, this is mainly for reducing testosterone
Also to help with my hair loss (due to pcos and high testosterone)
Saw palmetto
Biotin
I know this is a long (and expensive) list (if you can wait till Holland and Barrett have their buy one and get one for a penny a sale you will save some pennies, but some of them are not available in H&b, like Myo-instisol, nac, berberine)
Out of the above my must haves are
Must have - Myo-inositol
NAC
Must have - Vit C/D
Berberine (for the short term)
Biotin (only cause I have noticed my hair and nails are stronger)
Again I can't stress enough please read up on these and see if they actually meet your needs, maybe talk to you GP especially if you have other health conditions and also FYI some of these should not be taken once you do fall pregnant (berberine, liquorice root, omega oil)
If you have any questions don't hesitate to ask!