Some fruits affect blood sugar more than others. Experts use the glycemic index (GI) and glycemic load (GL) to help them estimate how fast and how long blood sugar rises after eating specific foods.

The GI scale measures how quickly a food raises blood sugar on a scale of 0 to 100; the GL factors in both GI and carbohydrate content to estimate the same effect.

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1. Watermelon

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Serving : 1 cup, cubed

Sugar : 9.42 grams (g)

Watermelon is a juicy fruit popular during the hot summer months. It has a high glycemic index of 75, making it one of the highest-GI fruits.

However, watermelon has a relatively low glycemic load (GL) of 5.6 due to its minimal carbohydrate content. (For reference, anything over 20 is considered high.)

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