@laurapix ask your oncologist but I believe that lab tests on estrogen don't show levels below a certain number, and the estrogen produced by adrenals is below that number (and presumably it is that low level that fed our cancers). Just because you get "undetectable" on your estrogen test does not mean your body is not producing estrogen. They just don't have a test that is sensitive enough. That is what I have been told but check with your docs.