Bagel is good at preventing diseases and helps digest food easily. In that regard, a bagel is a good snack for tennis players. Bagel Nutrition Facts. A bagel contains 9 grams of protein, 1 gram of fat, 55 grams of carbs, 2 grams of fibers, 7 grams of sugar, 71 milligrams of calcium, iron, and 82 milligrams of potassium. 9. Yogurt
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