Can People with High Blood Sugar Eat Watermelon?

Whether individuals with high blood sugar can eat watermelon depends on specific circumstances. Here are the main scenarios to consider:

When Watermelon Should Be Avoided

It is not recommended to eat watermelon when blood sugar levels are significantly elevated. When blood glucose is high, individuals may already experience symptoms such as dry mouth, increased thirst, and frequent urination. Watermelon has a high water content and natural sugars, which can increase urination and potentially lead to further dehydration. Severe dehydration may worsen diabetic symptoms and could even trigger acute complications such as diabetic ketoacidosis or hyperglycemic hyperosmolar state. In such cases, the priority should be to rehydrate the body and manage blood sugar levels with medical guidance, such as through insulin therapy or adjusting the current diabetes treatment plan.

When Watermelon Can Be Consumed in Moderation

If blood sugar is well-controlled, watermelon can be enjoyed in small amounts. This typically means having a fasting blood glucose level below 7 mmol/L and a post-meal (2-hour) glucose level under 10 mmol/L. When choosing to eat watermelon, it's best to consume it between meals—such as mid-morning or mid-afternoon—rather than right after dinner. Eating watermelon late at night may cause frequent urination during sleep, which can disrupt rest and affect morning fasting glucose levels.

Portion Control is Key

Even for those with stable blood sugar, portion size matters. It's important to consume only a small serving of watermelon to minimize the impact on blood glucose. Overconsumption, even with good glycemic control, can lead to a spike in blood sugar levels. As with any dietary choice for people with diabetes, moderation and awareness of individual responses are essential.