When we exercise or control our diet, our body starts burning fat. But how exactly is this fat excreted?

Before we can understand the process of fat burning, we need to understand the structure of fat. Fats are mainly made up of three elements: carbon, hydrogen, and oxygen. These elements are combined in different ways to form fatty acids and glycerol.

A fatty acid is a long-chain fatty acid that is made up of several carbon and hydrogen atoms. These fatty acids can be further combined to form triacylglycerol, which is commonly referred to as fat.

Fat metabolism refers to how the body converts fat into energy. When we exercise or control our diet, the body starts burning fat for energy.

The metabolic process of fat is mainly divided into two stages: lipolysis and fat oxidation.

Lipolysis refers to how the body breaks down triacylglycerol into individual fatty acids and glycerol. This process takes place in fat cells and is catalyzed by an enzyme called fatty acid esterase.

When we need energy, fatty acid esterases are activated and begin to break down triacylglycerol into fatty acids and glycerol. These fatty acids and glycerol can leave fat cells and enter the circulatory system.

Fat oxidation refers to how the body converts fatty acids into energy. This process takes place in the cells of the body and requires oxygen to participate.

When fatty acids enter cells, they combine with oxygen to form acetyl-CoA (Acetyl-CoA). Acetyl-CoA can enter the Krebs cycle, where it is further metabolized into carbon dioxide and water, and a large amount of energy is released.

When fats are oxidized to energy, the resulting carbon dioxide and water are not excreted directly from the body. Instead, they are excreted through breathing and urine.

When fat is oxidized to energy, the carbon dioxide produced is excreted from the body through respiration. Carbon dioxide is transported through the circulatory system to the lungs and then excreted through breathing.

When fat is oxidized to energy, the resulting water is excreted from the body through urine. Water is transported through the circulatory system to the kidneys and then excreted through the urine.