Originally Posted by
Lawofficer28 
how can we know when too much has been consumed to avoid damaging her liver?
she'd have to go to her doctor and find out. Maybe this will seem a weird question, but have you thought about why it is
you searching for answers about what level of alcohol your GF can drink without damaging her health?
If she were bothered about it, I'd expect her to be searching out the answers.
Which suggests that you are worried about her drinking and she is not. So i wonder what you are planning to do with any information you find, and how you imagine that information will be received?
Is her health your only concern re the alcohol or are there other things that are niggling too?