Calorie for calorie, bananas contain a lot of fiber. One medium banana provides around 12% of your recommended daily intake, with just 105 calories. Fiber is important for maintaining regular bowel habits, and plays a vital role in digestive health. Eating high amounts of fiber has even been linked to a reduced risk of heart disease, diverticular disease and some cancers. An adequate fiber intake is also linked to reduced body weight.
One study measured the food intake of 252 women for 20 months. It found that for every extra gram of fiber the women ate per day, their body weight was around 0.55 lbs (0.25 kg) lower. This effect is thought to occur because fiber makes you feel full for longer, which may help you eat fewer calories over the long term.
However, other studies have found that extra fiber in the diet does not affect people’s fullness or calorie intake.
Bananas are a good source of fiber. A high fiber intake has been linked to reduced body weight and a number of health benefits.