Food with low protein content: 1, vegetables such as melon, loofah, bitter melon, pumpkin, tomatoes, these melon vegetables contain relatively low protein. 2, vegetables such as leafy vegetables, such as spinach, leek, celery, oleander, cabbage, these leafy vegetables also contain very low protein. 3, fruits, such as bananas, oranges, grapefruit 3, fruits, such as bananas, oranges, grapefruit, oranges, kiwi, pears, these fruits also contain a very low amount of protein.