According to research, people with high sugar are more anxious, irritable, and tend to depression.
The brain depends on an equal supply of glucose, and sharp jumps of its level negatively affect its work. As a result, our mood suddenly gets worse.
Sugar also affects the absorption of another nutrient responsible for mood: chromium. This mineral is needed to maintain a stable level of blood sugar because insulin, which cleans glucose from the blood, cannot work properly without it.