Is coffee bought in cafeterias contaminated with egg yolk powder?

 At your risk.

This is not a medical or nutritionist advice.

I do not know.

I heard in public transport that a cafeteria in Athens had been closed down in the past as it was found that they were using egg yolk in order to make the coffee velvety creamy etc.

Deaths for example from heart attack or clogged arteries were experienced in the area before there was an order to check the cafeteria for substances that may increase bad cholesterol. 

Hopefully modern cafeterias...