Why have i been craving peanut butter so much? am i low on protein?

Food cravings: Food cravings may or may not mean what you think. Pica is a condition in which people crave dirt and eat dirt, often because they are iron deficient. I'm not aware of a condition related to peanut cravings, but it never hurts to consult a dietician to go over your eating habits and see what could be done to improve them. Try to eat a balanced diet with lot of vegetables, including peanuts.