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KUSA - A new study shows just how much added sugar can be damaging to your health.

The Centers for Disease Control and Prevention study suggests heart damage and weight gain occur once sugars added to foods go above 15 percent of your total calories.

That's about 300 hundred calories for people on a 2,000 calorie-a-day diet.

All it takes to reach that excess level is eating a big bowl of sugary cereal or drinking a soda every day for a week.

Outside experts are calling for federal guidelines to help people determine their limit.