Why:
Watermelon contains FODMAPs (fermentable oligosaccharides, disaccharides, monosaccharides and polyols), specifically fructose, which can cause bloating, gas, and diarrhea in people with IBS (Irritable Bowel Syndrome) or fructose malabsorption.
Clinical Insight:
According to Monash University, watermelon is listed as a high-FODMAP food, and they recommend avoiding it during an elimination phase of a low-FODMAP diet.
4. People Taking Certain Medications
Why:
Watermelon is rich in lycopene, and consuming too much of it can interact with certain medications, particularly blood thinners like warfarin, or drugs for high blood pressure (like beta-blockers), due to its high potassium content.
Research Insight:
Excessive lycopene intake has been linked to gastrointestinal disturbances and potential drug-nutrient interactions, especially with antihypertensives and antiplatelet medications.
5. People Prone to Allergies or Intolerances
Why:
Although rare, some people experience allergic reactions to watermelon, including itchy mouth, hives, and swelling, especially those with ragweed pollen allergy (oral allergy syndrome).
Evidence:
According to the American College of Allergy, Asthma, and Immunology (ACAAI), watermelon allergies can cause cross-reactivity in people allergic to other fruits or pollens.
Final Advice
While watermelon is generally safe and beneficial for most people, moderation is key—especially for individuals with pre-existing health conditions. If you’re uncertain whether watermelon is right for you, it’s best to consult a registered dietitian or healthcare provider.
✅ Key Takeaways:
- Watermelon is high in water, vitamin C, lycopene, and potassium.
- Limit watermelon if you have diabetes, kidney issues, IBS, or are on specific medications.
- Watch out for allergic reactions if you have a history of fruit or pollen allergies.
- Always eat fruit as part of a balanced diet.
