Watermelon is a delicious, refreshing, nutrient packed summer fruit. Discard the skin and white section before eating, choose a dark red flesh. Watermelon is low in calories and has a high water content and lots of fibre. It's high in vitamin C and vitamin A, contains potassium, magnesium and vitamins B1, B5 & B6. Watermelon is also high in beta-carotene which comes from the colour of the flesh.