I noticed when I switched from cream to oat milk, the coffee hits a little differently. It feels stronger. I'm not sure if its some interaction with milk. But paper should consider what is consumed with the coffee too. Some people will add sugar, and some even add butter.
Probably something to do with the fat. There's something called bulletproof coffee or butter coffee where they add butter/coconut oil/mct oil and I think it's supposed to satiate you more as well as keep you from getting all jittery.
Coffee might bind to the cream more and then absorb slower. I notice with a teaspoon of butter I get a much less jittery experience. (The bullet coffee thing).
I haven't really. I switched to Oatmilk, because I was getting stomach cramps about once a month. Still haven't figured out if the milk was causing it, because it happened again after the switch. Maybe its something in the coffee, maybe the pesticides they use or maybe I don't clean the coffee machine frequently enough. I drink as many as 5 cups in day. So I'm might have a bit of a problem.
Oat milk has added vegetable oils like sunflower, which have higher amounts of unsaturated fats i think. Someone mentioned coconut oil, which is high in satarated fat, could make a difference.