The Watermelon Diet: Examining the 3-Day Results and Long-Term Implications

In the quest for rapid weight loss, many are drawn to trendy diets like the watermelon diet, enticed by promises of quick results. This article delves into the specifics of the watermelon diet, explores its potential benefits and risks, and provides guidance on incorporating watermelon into a balanced eating plan for sustained health.

Understanding the Watermelon Diet

The watermelon diet, popularized on social media and reportedly by cheerleader Gabi Butler, typically involves consuming only watermelon for a short duration, usually three to five days. Some variations permit light meals or snacks alongside the fruit, while others strictly adhere to watermelon consumption alone. Proponents tout it as a "cleanse" or "detox" due to watermelon's low-calorie and hydrating properties.

What the Watermelon Diet Involves

The watermelon diet is a fad diet where people consume large amounts of watermelon over a set period, typically between three to five days. Some variations allow for light meals or snacks alongside the fruit, while some versions recommend that you eat only watermelon. It's often framed as a cleanse or "detox" in which users eat only watermelon for a set amount of time. Another user drank watermelon as juice for three days before returning to their regular diet and said they lost 12 pounds in the process (they also called out how the diet gave them leg cramps, supposedly due to lack of nutrients).

Not a Balanced Diet or a Detox

The watermelon diet is neither a balanced diet nor a short-term “detox.” The body is designed to eliminate toxins on its own-that's what your kidney and liver do for you every day naturally. Scientific evidence does not support the idea that specific foods or diets can “cleanse” the body any more effectively than these natural processes. The notion that you can eliminate toxins by solely eating watermelon is not backed by science - there is no research to support the efficacy or safety of the watermelon diet.

Researchers stress that the risks of fad diets and “cleanses” far outweigh the possible benefits. While these diets may help you lose weight in the short term, they’re often unsustainable and result in rebound weight gain. Restrictive and low calorie diets, in particular, are also associated with an increased risk of disordered eating and other negative health consequences, including depression, anxiety, nervousness, and irritability.

Read also: Risks of Watermelon Diet

Potential Benefits of the Watermelon Diet

Despite the lack of scientific evidence supporting the watermelon cleanse, watermelon itself offers several health benefits. The watermelon diet has a few purported benefits, including weight loss and hydration, and potential health benefits.

Weight Loss and Hydration

One of the purported benefits of the watermelon diet is its potential for short-term weight loss. Watermelon’s high water content helps keep you hydrated and may contribute to feelings of fullness. Watermelon is naturally a low-calorie food - one cup contains approximately 46 calories. It’s also over 90% water in weight, which means it’s hydrating and can contribute to feelings of fullness. Additionally, any initial weight loss from the watermelon diet is likely a result of reductions in water weight and muscle mass, not fat mass.

Nutritional Benefits

When included as part of a well-balanced diet, watermelon has many health benefits. Watermelon is a low calorie, nutrient-rich fruit that is packed with vitamins and minerals. It contains vitamin A, which can help your vision and immune system, along with vitamin C and vitamin B6, which have similar immune-boosting benefits.

Essential nutrients found in watermelon include:

  • Vitamin C: May boost immunity and lower your risk of chronic diseases.
  • Vitamin A: Helps maintain vision, supports immune system, and fights inflammation.
  • Lycopene: An antioxidant that may improve circulation and protect against DNA damage and heart disease.
  • Potassium: Helps regulate blood pressure and maintain electrolyte balance.

Exercise Performance and Recovery

Watermelon contains citrulline, an amino acid linked to improved exercise performance and reduced muscle soreness. Some studies suggest that consuming watermelon or its juice before workouts can enhance recovery by reducing post-exercise inflammation and oxidative stress.

Read also: Risks of Watermelon Diet

Risks and Drawbacks of the Watermelon Diet

Despite its potential benefits, the fruit-forward fad diet can come with harmful side effects. The risks of the watermelon diet outweigh its short-term benefits. It’s important to remember that watermelon itself is healthy. Healthy eating isn’t about cutting all food groups out and focusing solely on one.

Nutritional Deficiencies

The watermelon diet is very low in protein and fat, which are vital macronutrients your body needs to function properly. Eating only watermelon can cause muscle loss within the first 24 to 72 hours, as the fruit contains "almost no protein." The Dietary Guidelines for Americans recommends that adults consume 20 to 35 grams (g) of fat daily and a minimum of 56 g of protein for males and 46 g of protein for females.

If you were to consume one whole watermelon (4,576 g), you would only get 27 g of protein and 7 g of fat. These amounts are far below the recommended daily intake.

Potential Side Effects

Drastically reducing calorie intake may make you feel dizzy, lightheaded, and nauseous. Eating tons of fruit can also overwhelm your GI system and potentially lead to gas, bloating, and diarrhea. Watermelon is very high in potassium but very low in sodium, which can lead to an electrolyte imbalance and potential headaches and dizziness. As watermelon is mostly sugar and water, this can lead to blood sugar spikes and crashes, negatively impacting mood, focus and sleep.

Unsuitability for Certain Individuals

“[The watermelon diet] is not suitable if you are pregnant, nursing, or if you have a health condition, eating disorder, or history of disordered eating,” Cassetty says. It’s also not recommended if you work out a lot since watermelon doesn’t contain enough fuel for activity and recovery, she adds.

Read also: Healthy Diet Tea Option

Impact on Eating Habits

The diet also negatively impacts your ability to respond to hunger cues, enjoy nourishing meals, and can hinder your ability to learn what a well-balanced meal actually is, Cassetty says. The watermelon cleanse focuses on a “quick fix” rather than introducing sustainable healthy habits to kickstart weight loss, which in itself is problematic.

Is the Watermelon Diet Effective for Weight Loss?

By only eating watermelon (which, again, is mostly water), you’ll likely see weight changes within a few days. However, the watermelon diet is a short-term solution and is not a sustainable weight loss practice. The trend can seem appealing for folks on a weight loss journey since it feels attainable and lasts a short time compared to other diet plans. You will [likely] lose water weight, but once you start eating other foods, all your weight will come back.

Eliminating other foods and only focusing on one, you aren’t learning anything about healthy eating habits. Watermelon may work temporarily, but it shouldn’t be the only thing you’re consuming for weight loss. Even though watermelon is a healthy food, it is not healthy to exist on watermelon alone-and that would be the same for any single food, whether it’s cake or kale. By only focusing on one item, you’re eliminating vital proteins and healthy fats, which are essential nutrients for the body.

Healthier Alternatives for Weight Loss

If weight loss is your main goal, there are healthier options out there than the watermelon diet. Experts recommend shifting your mindset away from restricting foods and instead focusing on what you should include.

Incorporating Fruits and Vegetables

You can start by adding a fruit to your breakfast, then adding a vegetable to your lunch and dinner. This is especially helpful since most people don’t get enough fruits and veggies in general.

Balanced Diet with Watermelon

Although Cassetty and Gans do not recommend the watermelon diet, eating the popular fruit could help accelerate weight loss if combined with other balanced food groups. For example, eating watermelon as a snack may help you eliminate cravings in between meals or function as a dessert substitute to help you cut back on sugar, they say. Ultimately, integrating watermelon into your diet can help with weight loss, but shouldn’t be viewed as the end-all, be-all solution.

Sustainable Lifestyle Changes

The goal in losing weight shouldn’t be about a "quick drop on the scale," but a focus on lifestyle changes for a longer, healthier life. Eating "real food" will offer the right kind of support for weight loss and overall wellness. Whole vegetables, clean protein, healthy fats and plenty of fiber. Add in quality sleep, stress management and movement, and you’ve got a sustainable plan for lifelong health, not just short-term weight loss based on trendy internet fads.

Integrating Watermelon into a Balanced Diet

Adding more watermelon to your diet is easy because it tastes good and is so easy to prepare. Here are a few creative and delicious ways to eat more:

  • Dice watermelon and add to the top of a smoothie or yogurt.
  • Add watermelon chunks to a salad with red onion, mint, and feta.
  • Throw frozen watermelon into your smoothie for extra slush.
  • Add to your post-workout protein snack for hydration and carbohydrates.
  • Grill watermelon for a fun, summery side.
  • Use watermelon in place of tomatoes in salsa.
  • Sprinkle with chili powder to add heat and smokiness to your snack.
  • Save watermelon seeds and roast them in the oven.
  • Watermelon chunks, fresh mint and lemon (optional) in distilled water.
  • Fresh organic green leafy lettuce, raw sliced almonds, walnuts, fresh mint (roughly chopped), cherry tomato, watermelon chunks and made a dressing of: extra virgin olive oil, fresh dill, lemon juice, raw apple cider vinegar, chopped garlic, sea salt and fresh ground pepper to taste and poured atop my salad.

Potential Risks of Overconsumption

Too much watermelon can leave you uncomfortable with bloating and sometimes diarrhea. People who are sensitive to fructose are even more prone to these side effects, and they should be mindful of their watermelon intake. Watermelon is high in potassium, which can raise serum potassium levels; this condition is called hyperkalemia. People suffering from kidney disease are at high risk for elevated potassium levels and need to be careful. High potassium in your blood can result in irregular heartbeats and, in certain circumstances, can be life-threatening.

The USDA food database recognizes one serving of watermelon to be approximately 280g (about 1/16th of a watermelon). A healthy adult can safely eat 1-2 servings of watermelon per day.

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