Diabetics can eat watermelon in moderation, but the prerequisite must be that blood sugar is controlled in a more ideal state. The total amount of watermelon eaten each time must be controlled, not without moderation. Watermelon is rich in water and low in sugar, 100 grams of watermelon contains only 4.2 grams of sugar, and watermelon contains a large number of trace elements like calcium, phosphorus, iron, potassium, sodium and essential amino acids, rich vitamins, and some proteins, glucose, fructose, etc., so diabetics can eat in moderation.