<human>:  What are the negative effects of a high sugar diet?
<bot>: The negative effects of a high sugar diet include increased risk of type 2 diabetes, obesity, cavities, heart disease, and high blood pressure. It has also been linked to increased cholesterol and fatty liver disease, as well as to poor nutrition and impaired brain function. A high sugar diet can also lead to fatigue, mood swings, and decreased immunity. In some cases, a high sugar diet can even increase the risk of certain cancers.