I use so many herbal remedies I rattle. I think Holland and Barrett probably fund an extravagant lifestyle in the South of France, from the profits they make out of me....
I use evening primrose (my GP recommended that years ago, believe it or not - she only wished she could write me a prescription, she said!); agnus castus ('vitex'); Co Enzyme Q10 (recommended in the PCOS Diet Book); multivitamins with glucosamine (because I'm a veggie - glocosamine for joints as I'm running again), green tea (anti-oxidants and also many studies say it helps weight loss), and cinammon a couple of times a day, with food (so effective at evening out your blood sugars it probably outperforms prescription drugs, apparently).
Dietwise I'm pretty strict and boring, as a rule - I cut out the alcohol, down to a couple of glasses of wine once a week and only chocolate on special occasions although I eat raw chocolate whenever I want.... the food is wholemeal, 'real' things - high organic, high raw - am aiming at 2 meals a day raw food.
Also, I find if I don't exercise regularly and pretty hard, the symptoms don't stay under control even if my diet is clean, without a slip. So for me, is a combination of the herbal stuff, diet and exercise and if I let any one of them slip, the symptoms come back fast. Of the three, food seems to have the most effect on me, followed by diet. I think my herbal supplements would be a total waste of time and money IF I didn't work hard on diet and exercise - on their own, they are probably doing nothing. I need all 3 things under control to see slow progress. But yes, if I do all three - herbs, diet, exercise, I have regular (for me) periods. Once or twice a year, even when I was thin, without me eating well and exercising - every 5 weeks, if I do the right things. For me, weight loss and energy and the frequency of periods is the only clue it's working. I don't seem to have insulin resistance but my PCOS symptoms, left alone, are very severe.