They can help lower your blood pressure-
Bananas are high in potassium, which has a vasodilatory effect. What does this mean? Basically, increased potassium intake widens your veins, which reduces blood pressure. Now, you need about 4,700 mg of potassium per day, and the average banana offers 378 mg. Be sure to consume potassium from other sources too, throwing in a multivitamin if need be.
They can help with asthma-
In a study done in 2007, it was found that children who consumed a banana per day experienced less wheezing. Many fruits were tested during this experiment, and only bananas and apple juice from concentrate (not fresh apples) were found to make a significant difference.
Bananas can help fend off depression-
Tryptophan (the amino acid in turkey that makes you sleepy) is a really interesting molecule. As tryptophan is digested, it is converted into serotonin, which helps to alleviate depression. If you're having serious issues, see a professional, but it doesn't hurt to throw some yellow fruit in the mix!
They make you poop-
Well, they help it along. Bananas are rich in fiber, which helps to add bulk to the stool and allows the intestines to move things along right on schedule
I know, I know. How can a sweet fruit help you lose weight? The answer is vitamin B6. This handy-dandy vitamin can help fend off type 2 diabetes and is rumored to promote weight loss. Even if it's not the vitamin, the fiber in bananas helps keep you feeling full longer, which is definitely helpful when you're trying to drop a few pounds.
They can keep your bones strong-
Surprisingly, bananas apparently help strengthen your bones despite the lack of calcium. They contain fructooligosaccharides, which act as calcium's right-hand man. These non-digestive carbs promote growth and balance of probiotics in the gut, boost immunity, and improve calcium absorption.
Bananas can protect your peepers-
While carrots are frequently heralded as the beta-carotene champion, bananas contain a significant amount of vitamin A. Don't go too crazy with this though; while beta-carotene just turns you orange, vitamin A can have negative health effects.