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What Will Happen if You Eat 2 Bananas a Day

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Two bananas, one bunch, and a surprising list of things your body does differently over the next month.

Bright Side’s May 2017 breakdown, “What Will Happen if You Eat 2 Bananas a Day,” takes a fruit most people already keep on the counter and walks through exactly what changes when you eat two of them daily for roughly 30 days. The video isn’t selling a fad — it’s tracing specific nutrients (potassium, vitamin B6, resistant starch, tryptophan) to specific outcomes in the gym, the gut, and the mirror. It also throws in a skincare trick using the peel that most people toss straight in the trash.

• Two bananas supply roughly 400 to 450 mg of potassium each, which the video credits with enough sustained fuel and cramp protection to carry a 90-minute workout.
• A single banana delivers about 20% of the recommended daily vitamin B6, supporting the body’s production of insulin, hemoglobin, and amino acids used in cell repair.
• Unripe and slightly ripe bananas contain resistant starch that skips digestion in the small intestine and ferments in the colon, feeding beneficial gut bacteria.

Nutritional Composition of a Banana

The video starts with the numbers most people never bother to check. One medium banana runs about 105 to 110 calories, 28 grams of carbohydrates, and roughly 15 grams of natural sugar split between sucrose and fructose, with almost no fat. That’s a carbohydrate-heavy, low-fat profile that reads more like an endurance snack than a dessert substitute — which is exactly the point Bright Side makes before getting into what those carbs actually do once they’re in your system.

Pair that carb load with the potassium content — 400 to 450 mg per banana — and you get the fuel-and-electrolyte combination the video says is enough to carry a full 90-minute workout without a mid-session crash. That’s the same logic behind the fueling strategies covered in 10 HIIT Exercises to Lose Belly Fat FASTER, where sustained energy output matters as much as the exercises themselves.

The Vitamin B6 and Iron Angle

A single banana covers close to 20% of the recommended daily intake of vitamin B6, a nutrient the video ties directly to the body’s ability to synthesize insulin, hemoglobin, and the amino acids needed for cellular repair. That’s not a marginal benefit — B6 deficiency shows up in fatigue and impaired immune response, so hitting a fifth of your daily need from one piece of fruit is a real head start.

The dietary iron in bananas gets a similar treatment: it’s framed as support for red blood cell and hemoglobin production, which the video connects to anemia prevention. Combined with the B6 pathway, the case is that two bananas a day are doing quiet maintenance work on your blood chemistry that most people never notice until it’s missing.

Gut Flora and the Resistant Starch Factor

Bananas that are still a little green carry resistant starch — a form of carbohydrate that passes through the small intestine undigested and reaches the colon intact, where it ferments and feeds beneficial gut bacteria. The video calls this out specifically because bananas are also gentle on the gastrointestinal tract, making them one of the few fruits that’s both prebiotic and non-irritating at the same time.

Two bananas a day, eaten consistently for a month, is the entire experiment — no supplements, no tracking app, just fruit.

That prebiotic angle lines up with the broader gut-health conversation covered in Top 13 Probiotic Foods, where feeding the right bacteria matters just as much as consuming the bacteria directly.

Blood Pressure, Mood, and the Peel

Potassium’s other job in the video is counterbalancing sodium, which the average Western diet delivers in excess. That balance is what the video links to healthier blood pressure regulation over the month-long window. On the mood side, bananas contain tryptophan, an amino acid the body metabolizes into serotonin — the same neurotransmitter pathway tied to appetite and sleep regulation discussed in 8 Foods Men Should Eat Everyday (Science-Based).

The bonus tip closes out the video: banana peels contain antioxidants and minerals that can be used topically to moisturize skin, calm inflammation, and improve complexion, all without buying a separate cosmetic product. It’s a small, practical add-on to what is otherwise a nutrition-first breakdown — turning the part of the banana everyone throws away into the video’s final selling point.