I have never been able to find good data on this, but from what I have gathered, the effect depends on how much you have been drinking (drinks/day), and how lon

I have never been able to find good data on this, but from what I have gathered, the effect depends on how much you have been drinking (drinks/day), and how long you have been doing it (# of days). It does seem that gathering valid data on this would be very useful, but I am not sure how one could do a randomized control trial, when the express goal of doing so would be to measure the harm done by the 'treatment'.