i have a lot framed work... never had moisture problems.. work was framed by professionals... a bit more expensive... but much better than what I can do myself;
We have a piece of art professionally framed with a sealed back in our bathroom and even with it being done professionally, the seal is starting to pull away from the back with all of the moisture in the bathroom.
If a framed piece attracts mould in the bathroom, then I suspect a piece in the kitchen will become yellow over time, like the tiles behind the cooktop. This is from the fats and oils from cooking, it might be fine if away from that however.
Personally, my pieces are in the main hallway in my house where they are away from the majority of sun and sources of water