Quote from: JennyBaumann on February 04, 2014, 08:50:08 AM
Heard that taken orally it can cause liver damage, and since I also like my wine now and then, didn't want to tease the liver too much!
Consider that other forms of estrogen (Ethinyl Estradiol, Premarin, DES) were used for decades by transsexual women, that these other forms were not only more potent (up to 500-1,500x) in terms of liver effects but that their doses were quite high by our standards today and that despite this, liver damage was quite uncommon. Harry Benjamin, the pioneer in transgender care, himself even states
"The liver is the organ that metabolizes ("digests") the estrogen and it is conceivable (
although not actually shown) that it may be unfavorably affected by long-continued medication. A hazard may possibly exist if there is a history of hepatitis."
From The TRANSSEXUAL PHENOMENON
Harry Benjamin, M.D. , 1966
http://www.shb-info.org/sitebuildercontent/sitebuilderfiles/transsexualphenomenon.pdfConsider as well that birth control pills contain ethinyl estradiol, that they are prescribed to thousands of millions of women worldwide, and are equivalent to at least 500x the dose of oral estradiol.
The greater concern is clotting but bio-identical estrogen's effects are still negligible and absent if taken non-orally.
However, alcohol interacts with orally administered estrogen and reduces its concentration in the blood by increasing enzymes responsible for metabolizing estrogen. Alcohol is also more harmful to the liver than estradiol but drinking from time to time is fine.

Unless, you have issues with your liver, of course!