Fact checkedExpert's opinion

Expert's opinion

The article is a subjective view on this topic written by writers specializing in medical writing.
It may reflect on a personal journey surrounding struggles with an illness or medical condition, involve product comparisons, diet considerations, or other health-related opinions.

Although the view is entirely that of the writer, it is based on academic experiences and scientific research they have conducted; it is fact-checked by a team of degreed medical experts, and validated by sources attached to the article.

The numbers in parenthesis (1,2,3) will take you to clickable links to related scientific papers.

Is Watermelon Fattening Or Good For Weight Loss 2024?

Cassi Donegan

Updated on - Written by
Medically reviewed by Kathy Shattler, MS, RDN

Is Watermelon Fattening
Eating watermelon in moderation is good for weight loss regimens. Photo: Shutterstock & Team Design

Is watermelon fattening? Or is it good for weight loss? Watermelon is an excellent fruit you can eat while trying to lose weight. As long as you’re not allergic or intolerant to it, consuming watermelon may leave you feeling full and satisfied after eating it, thus, reducing your appetite.

Watermelon is a very sweet fruit that some consider a superfood, and it may take care of your sweet tooth craving to help you avoid overdoing it on high-calorie desserts. 

This article will explore watermelon’s nutritional value, its health benefits, and how it may help with weight loss. It will also provide some suggestions for adding it to your diet regimen. 

Is Watermelon Fattening Or Healthy To Lose Weight?

Does watermelon cause belly fat or any other type of weight gain? Since it’s a low-calorie food that is 90% water[1] and less than one gram of fat, watermelon is not fattening. 

However, if you eat too much watermelon, you may notice weight gain like any other food that may contribute excessive calories to an already overburdened diet. Even though it contains a natural sugar called fructose, too much sugar can increase weight gain,[2] and induce high insulin resistance, which could lead to diabetes. 

On the other hand, if you eat watermelon in moderate amounts along with a healthy, well-balanced diet, this fruit intake may help you achieve your weight loss goals.

Nutrition Value

Consuming watermelon will increase your intake of essential vitamins and minerals like vitamin C, calcium, and magnesium. It’s low in calories and nearly fat-free. Even a small amount of healthy fats and protein make this superfood all the more suitable for weight loss diets. 

The U.S. Department of Agriculture[3] provides these facts on the nutritional benefits of a one-cup serving of diced watermelon cubes.

NameAmountverify?
Energy45.6 calories
Protein 0.927 grams
Total fat, lipid0.228 grams
Carbohydrates11.5 grams
Total dietary fiber 0.608 grams
Total sugar9.42 grams
Calcium, Ca10.6 milligrams 
Magnesium, Mg15.2 milligrams
Zinc0.152 milligrams
Vitamin C, total ascorbic acid12.3 milligrams
Total folate4.56 micrograms
Choline, total6.23 milligrams
Nutrition value of one cup of diced watermelon Source: https://fdc.nal.usda.gov/

How Does Watermelon Help With Weight Loss?

Some people associate eating sweet foods with weight gain, but that isn’t always the case. Watermelon is low in calories, high in water content, and very satiating to the appetite, so filling up on watermelon leaves little room for sugary desserts or other high-calorie food additions.

Weight loss may occur when watermelon replaces unhealthy sweets made with refined, white sugar. Studies show[4] those with moderate fructose consumption, which is high in watermelon, have greater weight loss compared to a person with low-fructose consumption. 

Finding the balance of how much watermelon is right for your body is important. Let’s look at a few other reasons why eating watermelon may help you lose weight. 

Arginine 

One way watermelon may help you lose weight is by providing the body with an additional amino acid called arginine. This amino acid has been shown to help reduce fat in both animals and humans.[5] 

If reducing weight isn’t enough, arginine can also increase muscle mass and enhance[6] the coveted brown fat that contains our cellular powerhouses (mitochondria) and is known for its ability to increase metabolism and burn fat by turning it into heat. 

High Water Content

Another way you may lose weight with watermelon is through its high water content. Increasing water intake and hydration boosts your metabolism and can lead to loss of body weight.[7] 

Since drinking a glass of water before meals can help reduce calorie intake, you may benefit from eating watermelon dessert before your meal. 

Low-Calorie Density

Watermelon can further support weight loss simply by being a low-energy-density food. Because it’s a low-calorie and water-rich food, this refreshing fruit helps keep you fuller and may reduce your calorie intake. 

Research shows that there is a link between a food’s energy density and changes in body weight. This meta-analysis[8] concludes that consuming low-energy-density foods benefits weight loss in obese adults. 

Other Health Benefits Of Watermelon

With the variety of nutrients watermelon contains, it can provide an increase in several health benefits. Here are a few. 

Hydration

The majority of watermelon is made of water, reflecting its name. In addition to increasing the potential to lose weight, keeping your body hydrated with water is one of the most important things you can do for your overall health. 

Hydration helps take care of many aspects of your health,[9] including:

  • Brain health.
  • Digestive health.
  • Skin health. 
  • Joint health. 
  • Blood circulation.
  • Detoxification. 

Heart Health

Watermelon is a zero-cholesterol heart-healthy food containing lycopene, a phytonutrient in fruits that are a shade of red, like tomatoes and guava. Lycopene[10] can decrease inflammation and cholesterol levels. 

Citrulline[11] is one of watermelon’s amino acids that can help relax the blood vessels. Both of these nutrients can improve blood pressure and help prevent heart disease. 

Healthy Vision

Is watermelon fattening? Healthy Vision
Watermelon contains beta-carotene and vitamin A which are essential for healthy eyes. Photo: Shutterstock

Watermelon has nutrients such as beta-carotene and vitamin A that are crucial for eye health. Plant-based foods[12] help to prevent eye disorders as you age, such as cataracts, glaucoma, and age-related macular degeneration. 

Cancer Prevention

Watermelon is full of antioxidants, vitamins, and minerals that help keep your body healthy. Accumulations of free radicals[13] can harm your immune system and cause chronic disease and cancer if they build up, but eating antioxidant-rich foods like this fresh fruit may help you by fighting off free radicals. 

Adding Watermelon To Your Diet For Weight Loss

Finding watermelon to add to your weight loss diet may not be hard since they are available fresh in most grocery stores. There’s no lack of different watermelon recipes to try since you can eat the whole watermelon, even the rind. 

Here are some ways you can add watermelon to your diet for weight loss: 

  • Some people enjoy a watermelon cleanse using watermelon juice as their beverage choice for the day or week to promote losing weight.
  • Create a fruit salad with fresh lemon juice squeezed over watermelon, apples, and grapes for an easy dessert
  • Enjoy a watermelon smoothie to start your day. Freeze chunks of it and blend them with low-calorie milk like almond milk. It’ll boost your hydration, and its sweet flavor will discourage craving sugary treats. 
  • You can consume watermelon seeds as a snack or salad topping. You’ll be getting protein, healthy fats, and many vitamins. 

Does The Watermelon Diet Work?

Since eating a diet full of low-fat and low-calorie foods can result in weight loss, there is potential for you to experience weight loss on the watermelon diet. 

A study[14] demonstrated that those eating watermelon as a snack for four weeks had a decrease in body weight and body mass index or BMI. This was compared to a group that ate a low-fat cookie as a snack instead, and this group experienced an increase in their body weight and BMI. 

Some people replace their snacks for the diet, while others take it to the extreme and replace all their food with watermelon, which is not a wise decision as this type of diet can create multiple nutritional deficiencies that, in the long run, will work against sustainable weight loss.

If you’re eating only watermelon, your diet will lack the balance it critically requires to have a stable metabolism, and you may become nutrient-deficient in many areas, especially protein and essential fatty acids. An entire 13-pound watermelon only has 920 calories and less than a gram of protein, not even enough for a day’s requirements on a weight loss diet. 

A one-food diet should remain temporary and short-lived since it’s not sustainable for even more than a couple of days. You may want to check with your health provider and see how much watermelon you should eat each day before starting the watermelon diet, especially if you have any known medical conditions or are on medications. 

Is Eating Watermelon At Night Good For Weight Loss?

When you go to bed at night hungry, you might wake in the middle of the night and have the temptation to eat unhealthy snacks that promote weight gain. Having a serving of watermelon at night before bed can supply your liver with the fructose it needs to reduce hunger for other foods, stabilize blood sugar levels, and promote the release of fat-burning hormones,[15] not to mention the extra arginine your body gets! 

The Bottom Line

Is watermelon healthy for weight loss? Yes, eating watermelon is good for weight loss regimens, as long as it’s in moderation. Too little or too much may give you the opposite of the results you’re looking for. 

Watermelon is low in calories, an entire watermelon contains less than 1,000 calories, and it may be one of the best fresh fruits to reduce sugar cravings. Its high water content may help reduce your calorie intake and support your weight loss efforts. 

Eating watermelon is also beneficial for your overall health and increasing hydration levels. In addition, it can support your vision, heart, and immune system. 

If you decide to try a watermelon diet plan, including other low-energy-density foods with it will help achieve a balanced diet to ensure you get all the vitamins and minerals you need. One-food fad diets can result in nutrient deficiencies[16] that can slow your metabolism and lead to unwanted health conditions, even obesity. 


+ 16 sources

Health Canal avoids using tertiary references. We have strict sourcing guidelines and rely on peer-reviewed studies, academic researches from medical associations and institutions. To ensure the accuracy of articles in Health Canal, you can read more about the editorial process here

  1. Popkin, B.M., D’Anci, K.E. and Rosenberg, I.H. (2010). Water, hydration, and health. [online] 68(8), pp.439–458. doi:https://doi.org/10.1111/j.1753-4887.2010.00304.x.
  2. Elliott, S.S., Keim, N.L., Stern, J.S., Teff, K.L. and Havel, P.J. (2002). Fructose, weight gain, and the insulin resistance syndrome. [online] 76(5), pp.911–922. doi:https://doi.org/10.1093/ajcn/76.5.911.
  3. Usda.gov. (2023). FoodData Central. [online] Available at: https://fdc.nal.usda.gov/fdc-app.html#/food-details/167765/nutrients.
  4. Madero, M., Julio Cesar Arriaga, Jalal, D., Rivard, C.J., McFann, K., Pérez-Méndez, O., Armando Gómez Vázquez, Ruiz, A., Lanaspa, M.A., Carlos Roncal Jimenez, Johnson, R.J. and Laura-Gabriela Sánchez Lozada (2011). The effect of two energy-restricted diets, a low-fructose diet versus a moderate natural fructose diet, on weight loss and metabolic syndrome parameters: a randomized controlled trial. [online] 60(11), pp.1551–1559. doi:https://doi.org/10.1016/j.metabol.2011.04.001.
  5. McKnight, J.R., M. Carey Satterfield, Jobgen, W.S., Smith, S.B., Spencer, T.E., Meininger, C.J., McNeal, C.J. and Wu, G. (2010). Beneficial effects of l-arginine on reducing obesity: potential mechanisms and important implications for human health. [online] 39(2), pp.349–357. doi:https://doi.org/10.1007/s00726-010-0598-z.
  6. Jobgen, W.S., Meininger, C.J., Jobgen, S.C., Li, P., Lee, M.-J., Smith, S.B., Spencer, T.E., Fried, S.K. and Wu, G. (2008). Dietary l-Arginine Supplementation Reduces White Fat Gain and Enhances Skeletal Muscle and Brown Fat Masses in Diet-Induced Obese Rats. [online] 139(2), pp.230–237. doi:https://doi.org/10.3945/jn.108.096362.
  7. Thornton, S.N. (2016). Increased Hydration Can Be Associated with Weight Loss. [online] 3. doi:https://doi.org/10.3389/fnut.2016.00018.
  8. Stelmach-Mardas, M., Tomasz Rodacki, Justyna Dobrowolska-Iwanek, Brzozowska, A., Walkowiak, J., Agnieszka Wojtanowska-Krośniak, Paweł Zagrodzki, Bechthold, A., Marcin Mardas and Boeing, H. (2016). Link between Food Energy Density and Body Weight Changes in Obese Adults. [online] 8(4), pp.229–229. doi:https://doi.org/10.3390/nu8040229.
  9. Popkin, B.M., D’Anci, K.E. and Rosenberg, I.H. (2010). Water, hydration, and health. [online] 68(8), pp.439–458. doi:https://doi.org/10.1111/j.1753-4887.2010.00304.x.
  10. Ioana Mozos, Stoian, D., Alexandru Caraba, Clemens Malainer, J.O. Horbanczuk and Atanasov, A.G. (2018). Lycopene and Vascular Health. [online] 9. doi:https://doi.org/10.3389/fphar.2018.00521.
  11. Ikeda (2018). Cardioprotective effects of citrulline in ischemia/reperfusion injury via a non-nitric oxide-mediated mechanism. Methods and findings in experimental and clinical pharmacology, [online] 22(7). Available at: https://pubmed.ncbi.nlm.nih.gov/11196344/.
  12. Eleazar Uchenna Ikonne, Victor Okezie Ikpeazu and Eziuche Amadike Ugbogu (2020). The potential health benefits of dietary natural plant products in age related eye diseases. [online] 6(7), pp.e04408–e04408. doi:https://doi.org/10.1016/j.heliyon.2020.e04408.
  13. National Cancer Institute. (2017). Antioxidants and Cancer Prevention. [online] Available at: https://www.cancer.gov/about-cancer/causes-prevention/risk/diet/antioxidants-fact-sheet.
  14. Lum, T., Connolly, M.E., Marx, A., Beidler, J., Hooshmand, S., Kern, M., Liu, C. and Mee Young Hong (2019). Effects of Fresh Watermelon Consumption on the Acute Satiety Response and Cardiometabolic Risk Factors in Overweight and Obese Adults. [online] 11(3), pp.595–595. doi:https://doi.org/10.3390/nu11030595.
  15. Rhyu, J. and Yu, R. (2021). Newly discovered endocrine functions of the liver. [online] 13(11), pp.1611–1628. doi:https://doi.org/10.4254/wjh.v13.i11.1611.
  16. Via, M.A. (2012). The Malnutrition of Obesity: Micronutrient Deficiencies That Promote Diabetes. [online] 2012, pp.1–8. doi:https://doi.org/10.5402/2012/103472.
Cassi Donegan

Written by:

Cassi Donegan, LPN

Medically reviewed by:

Kathy Shattler

Cassi Donegan, Licensed Practical Nurse, is a freelance health writer and editor. She has over 17 years of nursing experience in various specialties including Neurology, Orthopedics, Spine, and Pediatrics. Patient care has convinced her to be passionate about educating others on nutrition, natural childbirth, home birthing, and natural remedies for the holistic and alternative healthcare field.

Medically reviewed by:

Kathy Shattler

Journal of Physical Education and Sport

Trusted Source

Go to source

SciELO - Scientific Electronic Library Online

Trusted Source

Go to source

African Journals Online

Non-profit Platform for African Journals

Trusted Source
Go to source

Journal of The American Board of Family Medicine

American Board of Family Medicine

Trusted Source
Go to source

Informit

RMIT University Library

Trusted Source
Go to source

European Food Safety Authority

Science, Safe food, Sustainability

Trusted Source
Go to source

OrthoInfo

American Academy of Orthopaedic Surgeons

Trusted Source
Go to source

American Academy of Family Physicians

Strengthen family physicians and the communities they care for

Trusted Source
Go to source

Agricultural Research Service

U.S. Department of Agriculture

Trusted Source
Go to source

The American Journal of Medicine

Official Journal of The Alliance for Academic Internal Medicine

Trusted Source
Go to source

National Institute on Alcohol Abuse and Alcoholism

Database From National Institute Of Health

Trusted Source
Go to source

Lippincott Journals

Subsidiaries of Wolters Kluwer Health, Inc.

Trusted Source
Go to source

National Institute on Aging

Database From National Institute Of Health

Trusted Source
Go to source

Translational Research

The Journal of Laboratory and Clinical Medicine

Trusted Source
Go to source

Cell

An All-science Publisher

Trusted Source
Go to source

Journal of Translational Medicine

BioMed Central

Part of Springer Nature
Go to source

Federal Trade Commission

Protecting America's Consumers

Trusted Source
Go to source

National Human Genome Research Institute

Database From National Institute Of Health

Trusted Source
Go to source

Food Production, Processing and Nutrition

BioMed Central

Part of Springer Nature
Go to source

BMC Gastroenterology

BioMed Central

Part of Springer Nature
Go to source

ACS Publications

A Division of The American Chemical Society

Trusted Source
Go to source

Annual Reviews

Independent, Non-profit Academic Publishing Company

Trusted Source
Go to source

PubChem

National Center for Biotechnology Information

National Library of Medicine
Go to source

PLOS Journals

Nonprofit Publisher of Open-access Journals

Trusted Source
Go to source

Thieme E-books & E-Journals

Peer-reviewed & Open Access Journal

Trusted Source
Go to source

European Journal of Agriculture and Food Sciences

Peer-reviewed International Journal Publishes

Trusted Source
Go to source

Royal Society of Chemistry Publishing Home

Chemical Science Journals, Books and Database

Trusted Source
Go to source

Frontiers

Publisher of Peer-reviewed Articles in Open Acess Journals

Trusted Source
Go to source

De Gruyter

German Scholarly Publishing House

Trusted Source
Go to source

Hindawi

Open Access Research Journals & Papers

Trusted Source
Go to source

Oilseeds and Fats, Crops and Lipids

EDP Sciences

Trusted Source
Go to source

Cambridge Core

Cambridge University Press

Trusted Source
Go to source

FoodData Central

U.S. Department Of Agriculture

Trusted Source
Go to source

Journal of the American Heart Association

Peer-reviewed Open Access Scientific Journal

Trusted Source
Go to source

National Center for Complementary and Integrative Health

Database From National Institute Of Health

U.S Department of Health and Human Services
Go to source

The Americans with Disabilities Act

U.S. Department of Justice Civil Rights Division

Trusted Source
Go to source

Journal of the Academy of Nutrition and Dietetics

Organization of Food and Nutrition Professionals

tr
Go to source

Sage Journals

Database From Sage Publications

Trusted Source
Go to source

National Institute of Drug Abuse

Database From National Institute Of Health

U.S Department of Health and Human Services
Go to source

The ClinMed International Library

A Repository and an Open Access Publisher for Medical Research

Trusted Source
Go to source

The Royal Society Publishing

United Kingdom's National Academy of Sciences

Trusted Source
Go to source

APA PsycNet

Database From American Psychological Association

Trusted Source
Go to source

The Pharma Innovation Journal

Peer-reviewed And Refereed Journal

Trusted Source
Go to source

Asian Journal of Pharmaceutical Research and Development

Peer-reviewed Bimonthly Journal

Trusted Source
Go to source

British Pharmacological Society

Journals - Wiley Online Library

Trusted Source
Go to source

American Psychological Association

Scientific and Professional Organization of Psychologists

Trusted Source
Go to source

AAP Publications

Database From American Academy of Pediatrics

Trusted Source
Go to source

Karger Publishers

Academic Publisher of Scientific and Medical Journals and Books

Trusted Source
Go to source

Cambridge University Press & Assessment

Database From Cambridge University

Trusted Source
Go to source

National Institute of Mental Health

Database From National Institute Of Health

U.S. Department of Health and Human Services
Go to source

MDPI

Publisher of Open Access Journals

Trusted Source
Go to source

Bulletin of the National Research Centre

Part of Springer Nature

Trusted Source
Go to source

The New England Journal of Medicine

Massachusetts Medical Society

Trusted Source
Go to source

Economic Research Service

U.S. DEPARTMENT OF AGRICULTURE

Trusted Source
Go to source

MedlinePlus

Database From National Library of Medicine

U.S Department of Health and Human Services
Go to source

National Institute of Health

An agency of the U.S. Department of Health and Human Services

Trusted Source
Go to source

Trusted Source

Database From National Institute Of Health

U.S Department of Health and Human Services
Go to source

The BMJ

Weekly Peer-reviewed Medical Trade Journal

The British Medical Association
Go to source

The British Psychological Society

The British Psychological Society is a charity registered in England

Database From Wiley Online Library
Go to source

National Heart, Lung, and Blood Institute

Database From National Institute Of Health

U.S Department of Health and Human Services
Go to source

PubMed

Database From National Institute Of Health

U.S National Library of Medicine
Go to source

DailyMed

Database From National Institute Of Health

U.S National Library of Medicine
Go to source

Google Scholar

Go to source

Science.gov: USA.gov for Science

Government Science Portal

Go to source

ResearchGate

Social Network Service For Scientists

Find and share research
Go to source

American Heart Association

To be a rentless force for a world of longer, healthier lives

Go to source

BioMed Central

Research in progress

Go to source

JAMA Network

Home of JAMA and the Specialty Journals of the American Medical Association

Go to source

Springer Link

Database From Springer Nature Switzerland AG

Springer - International Publisher Science, Technology, Medicine
Go to source

ODS

Database from Office of Dietary Supplements

National Institutes of Health
Go to source

Federal Trade Commission

Bureaus of Consumer Protection, Competition and Economics
Go to source

Trusted Source

Database From U.S. Department of Health & Human Services

Governmental Authority
Go to source

Oxford Academic Journals

Oxford University Press

Trusted Source
Go to source

Taylor & Francis Online

Peer-reviewed Journals

Academic Publishing Division of Informa PLC
Go to source

WHO

Database from World Health Organization

Go to source

Journal of Neurology

Peer-reviewed Medical Journal

American Academy of Neurology Journal
Go to source

ScienceDirect

Bibliographic Database of Scientific and Medical Publications

Dutch publisher Elsevier
Go to source

Wiley Online Library

American Multinational Publishing Company

Trusted Source
Go to source

Centers for Disease Control and Prevention

U.S. National Public Health Agency

U.S Department of Health and Human Services
Go to source

Trusted Source

Database from U.S. National Library of Medicine

U.S. Federal Government
Go to source

U.S. Food & Drug Administration

Federal Agency

U.S Department of Health and Human Services
Go to source

PubMed Central

Database From National Institute Of Health

U.S National Library of Medicine
Go to source
Feedback

Help us rate this article

Thank you for your feedback

Keep in touch to see our improvement