I was already wondering if they were picking up on differences in Asian nutrition and the effects of increased tofu consumption, and then this link was mentioned:

“While moderate coffee drinking appears safe, very high consumption may not be ideal, especially for women who drink alcohol,” he says.

When I think of beverage-related ways to isolate western women, coffee and alcohol seems like a good combination, though you miss the UK, Ireland, and part of the population in other commonwealth countries.

Reading the study, however, it followed primarily white women, so that’s probably moot. The article should definitely mention that the research relies mostly on white women though. I hope further studies look into more diverse subject pools though.