Ohhh!
Also, from what I heard. Taking a little wine each day does wonders to the body. But that's still alcohol, right? Hmm...
I think it's actually super inconclusive, as far as actual research goes, with different studies producing conflicting results.
Same thing with chocolate, and milk, honestly. My personal opinion is it's down to the individual, their unique microbiome and medical/genetic history (things like predilection to addiction, or allergies, for example), and so on.
All that is to say I don't think our FL here has that to worry about, being only 22 years old, as the other user stated. Hence I think she was covering up crying with "hay fever", and the ML was being snide about how he doesn't approve of her drinking habit (is my guess).