29. Orange

Oranges are considered to be the world’s healthiest food. The great source calcium and vitamin B in oranges produces melatonin efficiently and relaxes your body quickly. Hence, it can be used effectively to treat any kind of sleep related problems. An orange can fulfill up to 72% of daily requirement of vitamin C. It can also be used effectively to treat constipation, hair loss, rheumatic arthritis and diabetes etc.You can even try blood oranges in early spring season, since it has richer antioxidant content.