Eating watermelon and papaya can be part of a diabetes-friendly diet when portion size and meal composition are carefully considered, experts say, emphasising the importance of balance over blanket restrictions.
People living with diabetes do not necessarily need to avoid watermelon or papaya, but portion size and meal context matter. Verywell Health notes that whole fruit contains natural sugar alongside fibre, water and other nutrients, which means it affects the body differently from added sugar in sweets, biscuits and soft drinks. In practice, that makes fruit a matter of balance rather than blanket restriction.
Between the two, papaya has slightly more carbohydrate and sugar in a typical serving, but it also provides more fibre. The American Diabetes Association says 155g of watermelon contains about 11.7g of carbohydrate, 9.6g of sugar and 0.6g of fibre, while 165g of papaya provides about 18g of carbohydrate, 13g of sugar and 3g of fibre. That means the better choice is not always the fruit with the lower sugar figure, but the one eaten in a sensible amount and matched to the rest of the meal.
A 2019 study published in Nutrients helps explain why watermelon’s reputation can be misleading. Watermelon has a relatively high glycaemic index, or GI, which measures how quickly a food can raise blood glucose compared with a standard carbohydrate. Papaya’s GI is lower, but both fruits have a low glycaemic load, or GL, which takes account of the amount eaten. In everyday portions, that means neither fruit is likely to have a large effect on blood sugar for most people.
The practical advice from diabetes specialists is straightforward: keep portions moderate, eat fruit whole rather than as juice, and pair it with foods that slow digestion. The American Diabetes Association recommends combining fruit with protein, fibre or healthy fats, such as yoghurt, nuts, seeds, nut butter or whole grains, to blunt glucose spikes. Because individual responses vary, people with diabetes are best served by checking their own blood sugar after different foods and adjusting from there.
Disclaimer: This content is for informational purposes only and is not intended to be a substitute for professional medical judgment, advice, diagnosis, or treatment.
