At first i have to mention that its weird to find a banana in DayZ again, didnt know that they got reimplemented.
Anyway, when i force fed the banana to my friend his status decreased from energized and hydrated (dark green) to hungry and thirsty (yellow).
He drank a lot from a well but it didnt change anything, so he relogged. But then he was dying of dehydration and orange hungry, but luckily he was able to raise his status again then.