I have tried the herbs both individually and prepared formulas and I was very skeptical but they worked for me. Some women have quick results and others don't.
There is no evidence that herbs can cause cancer or other ailments when taken in moderate amounts. Some of the herbs have been used for thousands of years! It is synthetic hormones what cause cancer (such as in HRT and birth control pills). You can do your own research and should make an informed decision. I am happy I did, I'm currently trying to grow to 38DD but my growth has slowed down. It can take several months to years to grow larger breasts, but you need to balance your body's hormones first. This is one of the causes of underdeveloped breasts.