Cucumber
Cucumber also comes under the unpopular category of salad vegetables. This natural salad vegetable has enormous health benefits for humans. Cucumber contains almost 96% water, this higher amount of water is important for a person suffering from constipation. The food with 96% of the water in it is very beneficial for relieving the constipation situation. Eating more than one cucumber daily between your meals as a salad or as a snack significantly decreases the digestion time of the foods you eat the whole day.