Progesterone is best known for causing the monthly gift that so many women dread. It peaks suddenly right before that time of the month and causes the uterine lining to be shed. There are other things that progesterone is not as well known for, but are equally important. It inhibits breast tissue overgrowth (meaning less cause for breast cancer), increases metabolism (weight loss), and mobilizes fluid (no more water retention). Progesterone thins the blood (lowering the risk for blood clots), stimulates bone growth (prevents osteoporosis), enhances the thyroid, and so on.






