Excessive sugar intake adversely affects health by increasing the risk of various conditions, including obesity, diabetes, heart disease, and dental problems. High sugar consumption leads to weight gain, as it often comes from calorie-dense foods lacking nutritional value. It can also trigger insulin resistance, leading to type 2 diabetes and metabolic syndrome. Furthermore, sugar can contribute to chronic inflammation and fat buildup around organs, raising heart disease risk. Limiting added sugars and opting for whole foods can help mitigate these adverse health effects and promote overall wellness.