Watermelon is summer in fruit form: more than nine-tenths water, sweet, cooling and built for hot days. But behind the obvious refreshment is a fruit rich in the red antioxidant lycopene and the amino acid citrulline, which is why watermelon has earned a place in research on heart health, skin health and athletic energy and performance.
Compounds & anti-nutrients in Watermelon
Per 100 g, Watermelon is a notable dietary source of these active compounds. Tap any to see its full sources map and how to work with it.
Why watermelon is good for you
The deep red flesh owes its colour to lycopene, the same carotenoid that makes tomatoes red and one studied for heart and skin health; watermelon is in fact one of the richest dietary sources. It also supplies vitamin C and vitamin A as antioxidants. Most distinctive is citrulline, an amino acid the body converts towards nitric oxide, the molecule that helps relax blood vessels, which is why watermelon has attracted interest among endurance athletes.
Unusually for a carotenoid-rich food, watermelon’s lycopene is well absorbed even raw, so you do not need to cook it to benefit.
Watermelon nutrition at a glance
The full breakdown is in the nutrition label above. The short version is hydration with benefits: watermelon is mostly water, naturally low in calories, and its sweetness comes alongside that water and a little fibre. Because it is so watery its sugars are dilute, but it does have a higher glycaemic index than its modest calorie count suggests, so anyone managing blood sugar may prefer to enjoy it in sensible portions.
How to pick, store and eat watermelon
Look for a melon that feels heavy for its size, with a creamy-yellow patch where it rested on the ground, the sign it ripened fully before picking; a deep, hollow sound when tapped is another good cue. Keep a whole melon at room temperature, then refrigerate once cut and use within a few days. Beyond simple wedges, watermelon is excellent cubed into salads, blended into coolers or paired with a salty, briny contrast. It works beautifully with mint and lime, or alongside cubes of mozzarella or strawberries.
Common questions
Is watermelon good for hydration? Yes. It is more than ninety per cent water, so it contributes meaningfully to your daily fluids while providing electrolytes and antioxidants, which makes it a refreshing choice in hot weather or after exercise.
Can you eat watermelon seeds? Yes, the black seeds are perfectly safe to swallow or chew, and contain a little protein and minerals. They will not grow inside you, so there is no need to spit them all out.
Explore by health goal
Watermelon is one of many foods that support these goals:
