Sugar is bad for you: Sugar has a lot of calories, if you have diabetes or a diabetes-related condition — lets say high blood fat levels — then having sugar will increase your blood sugar, and your triglycerides, which is a risk factor for heart disease.

Eating too much added sugar can have many negative health effects: An excess of sweetened foods and beverages can lead to weight gain, blood sugar problems, and an increased risk of heart disease, among other dangerous conditions.

1. Sugar causes glucose levels to spike and plummet:
Unstable blood sugar can leave you experiencing mood swings, fatigue, and headaches. It also contributes to cravings, which begins the cycle of false hunger. By contrast, those who avoid sugar report having fewer cravings while feeling more emotionally balanced and energized.

2. Sugar increases the risk of obesity, diabetes, and heart disease:
While we all like to indulge once in a while, foods that quickly affect blood sugar contribute to a greater risk of obesity, heart disease, and diabetes.1 Emerging research also suggests connections between these high-glycemic diets and various forms of cancer.2,3,4 These effects are often a result of added sugar working in your body, so be sure to read those nutrition labels.

3. Your immune function can be affected by sugar:
Studies have shown that sugar can interfere with the way your body fights disease.5 Bacteria and yeast feed on sugar, so excess glucose in the body causes these organisms to build up and cause infections.