Recent comparisons reveal that while both watermelon and papaya can be enjoyed in moderation, papaya’s higher fibre content and moderate glycaemic index may offer a slight edge for those managing blood sugar levels, challenging common assumptions about sweetness and glycaemic impact.
Many people with diabetes, or those simply trying to avoid sharp swings in blood sugar, are wary of fruit that tastes especially sweet. But the comparison between watermelon and papaya is more nuanced than sweetness alone. According to Verywell Health, both fruits can fit into a balanced diet when eaten in sensible portions, because their natural sugars come packaged with water and fibre, which slow digestion and help soften the impact on blood glucose. Verywell Health also notes that neither fruit is likely to cause a major spike when portion sizes are kept in check.
The difference lies in how their carbohydrates are delivered. In a one-cup serving, watermelon contains fewer carbohydrates and less sugar than papaya, but it also offers far less fibre. Papaya, by contrast, has more sugar and carbohydrates per cup, yet it provides more fibre, which can help slow the rise in blood sugar after eating. Healthline says papaya has a moderate glycaemic index of about 60, while Signos Health gives it a similar figure of 61, placing it in the medium range rather than the high one.
Watermelon is often misunderstood because its glycaemic index can appear high in some references. The Glycaemic Index website explains that the index for fruit can vary depending on variety, ripeness and testing method, and that glycaemic load is often a better real-world guide because most whole fruits contain a lot of water and relatively modest amounts of available carbohydrate per serving. Tap Health makes a similar point about watermelon, noting that while its glycaemic index may be high, a normal serving still delivers a relatively small carbohydrate load because the fruit is mostly water.
Taken together, the evidence suggests papaya has a slight edge if the aim is steadier blood sugar, largely because of its higher fibre content and medium glycaemic index. Still, neither fruit is automatically off limits. Portion control matters more than the fruit’s sweetness, and Healthline says pairing papaya with protein or healthy fats can help keep blood sugar more stable. For most people, the better choice is not to avoid either fruit entirely, but to eat either one in moderation and pay attention to serving size, overall diet and individual response.
Disclaimer: This content is for informational purposes only and is not intended to be a substitute for professional medical judgment, advice, diagnosis, or treatment.
