A high-sugar diet negatively impacts health by promoting weight gain, increasing the risk of diabetes, and contributing to heart disease. Excess sugar consumption can lead to spikes in blood glucose, causing the body to store excess energy as fat. This creates a cycle of cravings and can result in long-term metabolic issues. Furthermore, high sugar intake is linked to inflammation and may reduce overall nutrient intake by displacing healthier food options. Reducing sugar consumption can improve overall health and support better weight management.