I've been on BC since the birth of my son and so, yes I have been on BC during every method of BE I have tried. I have tried commercial products, individual herbs, and currently trying BO. There is more information on what I'm currently taking under my thread on the pics section. With the commercial products, the first one I tried I took for 6 months, that was what was the max suggested, I spent over $300 on it, and it did NOTHING! I went with it because they had a full year money back guarantee, well I went to get my money back and they kept giving me the run around, so needless to say was a waste. The next commercial product I tried was a gum product and it did increase me about 2 inches, and that growth stayed even after stopping it. I took the product for 6 months. Right before starting noogling I bought individual herbs and started taking them. I started breaking out more than normal, I also gained weight, and my hair started falling out more. So after a few months of trying I stopped. Through noogling I have gained so far with it, and it's too early to tell if the BO is working. But none of the things I tried messed with my BC. The best thing I can tell you is to do your research and find what you are most comfortable with. Look on Eve's forum and the BE board. Some on this board swear by PM and MSM, I never tried those, well I recently found out the HA supplement I'm taking has MSM in it, but I just started taking it and it wasn't for BE. So we'll see what happens. If you ever doubt something you can always go to a doctor and ask. But if you go to the wrong doctor they will try to tell you the only way to increase breast size is through surgery, don't listen to it.