Sugar is not harmless fuel but a metabolic disruptor. All carbohydrates break down into glucose, which the body can use or store only in limited amounts. Fructose is far more dangerous: it is processed almost exclusively by the liver, rapidly converted into fat, and drives fatty liver, insulin resistance, and metabolic disease without obvious blood sugar spikes. HFCS and “natural” sweeteners deliver similar harm. Reducing sugar removes a major metabolic burden.