Teepee
Thru Hiker
Something here about the negatives of drinking coffee before breaking a fast (empty stomach) in regard to insulin levels.
Not disagreeing with anything... just makes me wonder if you're going to drink coffee, when is the appropriate time?
There seems to be some conflicting research, but it seems that caffeine increases blood sugar pre/post meals. Also cortisol and adrenaline. This will naturally increase insulin production. Adding fat and carbs to caffeinated drinks likely won't help.
It's likely why caffeine is so good pre exercise.
It's probably safe to say to take (preferably black) caffeine on an empty stomach and not with or immediately after meals. Once food has been largely digested and blood sugar has dropped, it's probably fine to have some again.
Personally, I've stuck to this for quite a while now and won't drink coffee/tea with food. On a fasting/hiking/running/excercise day when I'm not eating this is easy. On a work day, eating breakfast mid morning works well (if able)