My girlfriend suffers from bipolar mania and PMS, and I've tried hard to figure out why she can be the most perfect, wonderful, loving girlfriend for months, then turn into a mean, vicious, heartless, remorseless monster and kick me out of the house. Then she started taking an herb called fenugreek to increase milk production while breastfeeding. Within less than two weeks she transformed back into the wonderful, loving woman I fell in love with and it was better than ever! After doing more research I determined that the culprit was a neuropeptide hormone called oxytocin, the love hormone. It's responsible for milk production, bonding, trust, openness, reduction in stress/anxiety, and to some extent libido. It was a beautiful transformation! Apparently there was an intranasal form of oxytocin available previously, but now you have to get it custom made, but fenugreek seems to promote its production. I guess the key is to make sure that she takes it regularly while her oxytocin levels are high and she's still reasonable! Otherwise the bad version of her may refuse to take it!