[Lotus]

As we take our car ride:

To understand the estrogen pathway better, lets use the analogy of a car ride. Your trip begins in the ovaries where estrogen is made and then is released into the blood. The blood vessels are like highways and estrogen flows through these blood vessel highways to get to its target destinations.

So if you didn't read the article yet!

As Dr. Horner mentioned, estrogen (and other hormones) that are bound to SHBG are in the "carpool lane" and cannot make random exits from the bloodstream. Only "free" (unbound) estrogen can roam through various tissues of the body searching for estrogen receptor sites to lock on to. In terms of our risk for breast cancer, it is only the free estrogen that concerns us. However, there is more to the story.

(sounds a lot like free testosterone trying to aromatize)

Flooding with E!

You may have heard of a condition referred to as "Estrogen Dominance". This is where the body is flooded with higher than necessary levels of estrogens, which might be produced by your own body, or come from a toxic source, xenoestrogens. Usually it is a combination of both.

In addition to the deleterious effects we have already discussed in regards to excess estrogen in the body, there is now a complicating factor. High levels of estrogen in the body trigger the release of sex hormone-binding globulin, as the body tries to maintain balance by inactivating some of the excess estrogen. But, at the same time the estrogen is being inactivated, the release of high amounts of SHBG causes other important hormones to become bound and inactive as well.

http://www.womenswellnessconsulting.com/pro_active_protocol/estrogen_101/index.html

Estrogen, so much more to talk about if anybody's interested.