From peanut butter to marinara sauce, even the most unexpected products can contain added sugar. A lot of people rely on fast, processed foods for their snacks and meals. And because these products are packed with added sugar, it would make up a big part of their daily calorie intake. Research has shown that on average, added sugars make up to 17% of the total calorie intake in adults. It is recommended that you limit calories from added sugars to lower than 10 percent daily. A lot of healthcare professionals suggest that consumption of sugar is a significant risk factor for obesity and a number of chronic diseases, which includes type 2 diabetes. These are some of the major reasons why consuming too much sugar is bad for you and you should aim to cut back on it.