True, and it could also be what the person has with the coffee. I have a feeling people that drink instant coffee are more likely to add milk, creamer, or sugar.
That said, instant coffee is just freeze-dried coffee. There's a possibility its effect is no different.
I think it’s typically a different species (Coffea canephora). So theoretically drinking bean tea of a different plant could have different health impacts.
That said, instant coffee is just freeze-dried coffee. There's a possibility its effect is no different.