Your body constantly sheds weight throughout the day, even while you are resting. The average human loses about 2 to 4 pounds of mass every single day. Most people assume this lost weight vanishes as sweat or solid waste, but science proves otherwise. The primary way you lose mass is actually through breathing out carbon dioxide. When your body burns fat and carbohydrates for energy, it breaks them down into water and gas. You exhale the carbon dioxide through your lungs, effectively breathing out your fat. The remaining byproduct is water, which leaves your body through urine, sweat, and tears. Microscopic skin cells and hair strands also fall off daily, contributing a tiny amount to the total loss. Even the simple act of sleeping burns calories and expels moisture, reducing your weight by morning.