There is substantial evidence to support the link between sugar consumption and weight gain, making it a reality rather than a myth. Consuming excessive amounts of sugar can lead to weight gain due to several reasons.

First, sugar is high in calories but lacks essential nutrients, leading to an imbalance in energy intake. Excessive consumption of sugary foods and beverages can contribute to an overall increase in daily calorie intake, which can lead to weight gain over time.

Second, consuming large amounts of sugar can lead to insulin resistance, which can promote fat storage and make it harder for the body to break down fat for energy. This can contribute to weight gain and increase the risk of developing obesity.

Furthermore, high sugar intake can lead to increased cravings and overeating, as it can disrupt the body's natural hunger and satiety signals. This can lead to consuming more calories than needed, ultimately leading to weight gain.

Several studies have demonstrated the association between sugar consumption and weight gain. For example, a study published in the American Journal of Clinical Nutrition found that higher consumption of sugar-sweetened beverages was associated with a greater risk of obesity in both children and adults.

In conclusion, the link between sugar and weight gain is supported by scientific evidence and should be taken seriously. Reducing sugar intake and opting for healthier alternatives can play a significant role in weight management and overall health.