Sugar negatively impacts gut health by altering the composition of the gut microbiome. High daily intake of sugar can promote the growth of harmful bacteria and yeast, leading to imbalances in gut flora. This imbalance may result in issues like inflammation, digestive problems, and an increased risk of conditions like obesity and diabetes. Additionally, excessive sugar consumption can contribute to an overproduction of insulin, which can further disrupt gut health. Thus, moderating sugar intake is crucial for maintaining a healthy gut microbiome and overall digestive health.