Banana Diet

 By Mizpah Matus B.Hlth.Sc(Hons)

banana-dietThe banana diet involves a number of eating plans that use bananas as the primary food basis of the diet.

When the Morning Banana Diet was promoted on the Japanese social networking site ‘Mixi’ in March 2008 it became so popular that it resulted in a nationwide banana shortage.

The diet was created by Hitoshi Watanabe who has studied preventative medicine and his wife Sumiko who is a pharmacist.

The Morning Banana Diet Basics

The creators of the Morning Banana Diet claim that eating only bananas and drinking room temperature water for breakfast leads to weight loss regardless of what is consumed for the rest of the day.

morning-banana-dietThe diet is extremely simple and easy to follow however many Japanese have reported rapid weight loss when experimenting with this diet.

One of the reasons why the diet may work is that bananas are said to improve digestion and boost metabolism. Another possibility is that bananas are high in resistant starch, which is a type of fiber that can promote the feeling of fullness and may block the absorption of some carbohydrates.

The reason why the water has to be room temperature is not certain but many theories have been speculated on the Internet such as that it improves digestion or reduces hunger.

Dieters are also advised to eat their evening meal before 8pm and to avoid desserts after dinner. If feeling very hungry it is acceptable to have a piece of fruit.

Aside from eating bananas for breakfast and avoiding late night eating another rule of the diet is that you must go to sleep before midnight every night. The rationale behind this advice is sound as scientific studies show a relationship between sleep deprivation and obesity

At all times dieters should follow the Japanese principle of eating until only 80% full.

Dairy products and alcohol are also not allowed on this diet. In addition the only beverage that may be consumed with meals is room temperature water.

Recommended Foods

Bananas – must be raw, not cooked and not frozen.

Sample Diet Plan


One or more bananas (as many as desired until full)
One glass lukewarm water


Meal of choice

Afternoon Snack

A small sweet snack is allowed around 3pm if hungry


Meal of choice but must be eaten before 8pm
No dessert

Low Calorie meal options can be found here.

Exercise Recommendations

Dieters are told they should exercise only if they want to.

You may want to try these exercises with the Morning Banana Diet.

Costs and Expenses

See The Morning Banana Diet Official Website


  • Eating breakfast every day may increase metabolism and reduce the likelihood of overeating later in the day.
  • Avoiding caffeine at breakfast may lead to more stable blood glucose levels and reduced appetite.
  • Not eating after 8pm will reduce tendency for late night snacking on high calorie foods.
  • Avoiding dairy products and dessert will reduce calories by limiting fat and sugar intake.
  • Bananas are a nutritious food and high in fiber, vitamins B6 and C and potassium.
  • Discourages overeating.


  • Some dieters may not respond well to a pure carbohydrate breakfast particularly those with hypoglycemia.
  • Easy for dieters to consume excess calories if they eat whatever they like for lunch and dinner.
  • Does not encourage exercise.
  • Does not address psychological factors involved in dieting.

Less Calories Still Key

If dieters are experiencing success on this diet it is not likely to be due to any special fat burning qualities of bananas. It is much more likely that it is related to following the other rules of the diet such as eating only at specific times of the day and avoiding desserts.

This will result in a reduction of calories that will promote weight loss so long as dieters do not consume excessive calories in their other meals.


  • Nieman, D. C., Gillitt, N. D., Henson, D. A., Sha, W., Shanely, R. A., Knab, A. M., … & Jin, F. (2012). Bananas as an energy source during exercise: a metabolomics approach. PloS one, 7(5), e37479. link
  • Ganeshamurthy, A. N., Satisha, G. C., & Patil, P. (2011). Potassium nutrition on yield and quality of fruit crops with special emphasis on banana and grapes. Karnataka Journal of Agricultural Sciences, 24(1). link
  • Kumar, K. S., Bhowmik, D., Duraivel, S., & Umadevi, M. (2012). Traditional and Medicinal Uses of Banana. link
  • Beccuti, G., & Pannain, S. (2011). Sleep and obesity. Current opinion in clinical nutrition and metabolic care, 14(4), 402. link
 By Mizpah Matus B.Hlth.Sc(Hons)
Last Reviewed: December 9, 2014. Disclaimer


  1. srid

    can i have my regular tea in the morning , and then have banana with tea with milk ok to drink on this diet? please help

  2. Faz

    omg u people crack me up. Of course it’s not gonna work for everyone! Everyone’s body is unique, different diets will work for different people. So if it didnt work for u then stop whinging about it and go try another. To those who it worked for, great! Some good feedback….im gonna give it a crack starting tomorrow moring =) heaps excited…

  3. ROXY


  4. Upeksha

    Yoghurt or tea with milk not allowed?

  5. Jacqueline Fredrick

    Can this help me to loose my kilos?

  6. lucy

    only diet that has ever worked for me

  7. AmandaJefferies

    Best diet ever!!!
    Works like you wouldn’t believe!!!

    Have lost 15kg so far (2 months)
    The weight is dropping like crazy!!!!!!!!

  8. terri

    im starting this next week with a grapefruit also hopes it works cuz i have 2 kids and iam soooo over weight

  9. faiza

    i just read abt this diet well i m also doin another kind of banana diet so i will do this after that it seems gud but prb is that u shud hv to wake up early in the morning n its imposible for me !! 🙁

  10. gazebo

    I tried this awhile ago. I quit soon after because eating so many bananas in the morning made me go to the bathroom frequently. It was annoying so I stopped. Good luck to everyone on this diet, if you don’t mind going to the bathroom…..ALOT!!!!

  11. MAUI

    ive already tried dis before.i agreed that banana diet is true.every morning i eat banana and i noticed my belly become smaller.i was so happy.

  12. ShihChun

    It takes me about a year. but if you like it faster then go on adiet will do good and faster. Rember how fast you lose weights how soon you gain back! If you still have some question. E-Mail me to

  13. hira

    i hope it will work

  14. Liliana

    It’s not only about eat bananas for breakfast u guys have to do exacly what they say for it to work.I’m doing it with out cheathing and i have lost 6kg since 9 of February.

  15. Cuchimama

    That shit aint werk unless you eat crackers and non fat cheese for the rest of the day.thats why i am now proudly 6 ft and 118 pounds!40 pounds lost over 2 months!

  16. Sharon

    I hope it will work for me.