Summer’s favorite fruit may be more than just refreshing — research suggests watermelon can support heart health and boost overall nutrient intake for both adults and children.
What the research shows
– Multiple studies, including reviews published in 2022 and 2025, indicate watermelon contains compounds that could protect cardiovascular health.
– Watermelon is rich in L-citrulline, an amino acid linked to improved blood vessel function and increased nitric oxide production. These effects can help lower blood pressure and reduce arterial stiffness, particularly in people with cardiometabolic risk factors.
– The fruit also provides potassium, lycopene, fiber, and vitamin C, nutrients associated with better heart health and improved diet quality. Increased watermelon consumption tends to raise intake of these essential nutrients and helps with hydration.
How it may work
L-citrulline from watermelon can be converted in the body to L-arginine and then to nitric oxide, a molecule that relaxes blood vessels and improves blood flow. Lycopene and potassium further support vascular health and blood-pressure control. While the precise magnitude of benefit needs more research, current evidence suggests regular watermelon consumption can be a helpful component of heart-healthy eating patterns.
Expert perspective
Dietitians and preventive-medicine specialists note that watermelon is a useful addition to an overall healthy diet because of its nutrient mix and hydrating quality. However, they emphasize it should complement — not replace — a balanced diet and other lifestyle measures needed to meaningfully lower risks of heart attack and stroke.
Practical ways to enjoy more watermelon
– Eat a simple chilled slice.
– Blend into smoothies for added hydration and flavor.
– Toss into salads (try feta and mint).
– Make a chilled watermelon gazpacho.
– Pair with nuts or Greek yogurt for protein and healthy fats.
– Juice it, add to cottage cheese, thread onto skewers, grill slices as a side, or freeze for homemade popsicles.
Bottom line
Including watermelon regularly can increase intake of heart-supporting nutrients, improve hydration, and may help lower blood pressure and improve blood-vessel function. For best results, enjoy it as part of a varied, heart-healthy eating pattern and healthy lifestyle.
