Sure, some fast food chains are worse than others, not all pizzas are created equal, and even some frozen dinners can be hazardous to your health. But here’s a new one: is there a saturated fat- and calorie-bomb lurking inside that innocent-seeming bowl of cereal? A bowl of Cap’n Crunch isn’t as bad as a sodium-packed slice of pepperoni pizza, but there’s still loads of sugar—up to 50% for some brands—in every bite of many popular breakfast cereals. To find the 20 deadliest cereals on your grocer’s shelf, The Daily Beast used data from Good Guide and limited our list to the most popular brands. This ranking is based on Good Guide’s health score, on a scale of 0 to 10, worst to best. Ties were broken by total calories per serving. Calories: 120 Saturated fat (g): 1 Carbohydrates (g): 24 Sugar (g): 9 Good Guide health grade: 4.4 Calories: 220 Saturated fat (g): 1.5 Carbohydrates (g): 38 Sugar (g): 12 Good Guide health grade: 4.4 Calories: 110 Saturated fat (g): 0 Carbohydrates (g): 23 Sugar (g): 10 Good Guide health grade: 4.3 Calories: 110 Saturated fat (g): 0 Carbohydrates (g): 24 Sugar (g): 14 Good Guide health grade: 4.3 Calories: 190 Saturated fat (g): 0 Carbohydrates (g): 45 Sugar (g): 19 Good Guide health grade: 4.0 Calories: 120 Saturated fat (g): 0 Carbohydrates (g): 26 Sugar (g): 9 Good Guide health grade: 3.9 Calories: 200 Saturated fat (g): 1.5 Carbohydrates (g): 44 Sugar (g): 14 Good Guide health grade: 3.8 Calories: 220 Saturated fat (g): 0 Carbohydrates (g): 45 Sugar (g): 16 Good Guide health grade: 3.8 Calories: 200 Saturated fat (g): 0 Carbohydrates (g): 40 Sugar (g): 17 Good Guide health grade: 3.7 Calories: 180 Saturated fat (g): .5 Carbohydrates (g): 38 Sugar (g): 14 Good Guide health grade: 3.6 Calories: 190 Saturated fat (g): 0 Carbohydrates (g): 44 Sugar (g): 12 Good Guide health grade: 3.4 Calories: 110 Saturated fat (g): 1 Carbohydrates (g): 26 Sugar (g): 11 Good Guide health grade: 3.3 Calories: 110 Saturated fat (g): 1 Carbohydrates (g): 26 Sugar (g): 11 Good Guide health grade: 3.3 Calories: 110 Saturated fat (g): 0 Carbohydrates (g): 26 Sugar (g): 12 Good Guide health grade: 3.2 Calories: 120 Saturated fat (g): 0 Carbohydrates (g): 25 Sugar (g): 12 Good Guide health grade: 3.2 Calories: 220 Saturated fat (g): 2 Carbohydrates (g): 40 Sugar (g): 13 Good Guide health grade: 3.1 Calories: 220 Saturated fat (g): .5 Carbohydrates (g): 50 Sugar (g): 19 Good Guide health grade: 3.0 Calories: 100 Saturated fat (g): 0 Carbohydrates (g): 24 Sugar (g): 15 Good Guide health grade: 2.9 Calories: 110 Saturated fat (g): 1 Carbohydrates (g): 23 Sugar (g): 12 Good Guide health grade: 2.8