I am very concerned about this strategy....You wrote that "Dr. Jorge Fleches takes boron for his osteoporosis. He is taking 30 mg of boron per day, if I heard right. I know of some people who are taking 75-125 mg per day. Estrogen in your body becomes amplified at those high doses." High does of estrogen can lead to increased chances of breast cancer. It is VERY important to check with your specialists before trying this. There are safer ways to build bone density!