I was taking ACV for about 9 months--2 tablespoons in orange juice every evening. For my fibroids. Then I stopped for about 2.5 months. I just started again. ACV never really lightened my heavy periods. It just made my period shorter. That is, the 2 days would be very, very heavy. Then much lighter the next few days. And then gone after about 3 or 4 days. ACV has helped with other issues (lethargy, respiratory cough). But I still get heavy Days 1 and 2.