• September 29, 2023

FAT: 03 steps that body processes fat that you should know.



Everyone knows that FAT is an essential part of our diet. But what happens to the FAT once we consume it? How does our body process it and utilize it for energy?

In this blog post, we will explore how the human body processes the FAT we consume. From the mouth and stomach to the small intestine and beyond, read on to learn more about how your body breaks down and uses FAT for energy.

How your body processes fat

When you eat foods that contain fat, your mouth and stomach break down the fat into smaller pieces. The small intestine then absorbs the fat into the bloodstream.

The body transports the fat to where it will be used for energy or stored. Most of the fat you consume is used for energy. Some of the fat is stored in the liver and some is stored in adipose tissue (fat cells).

The body can use both dietary fat and body fat for energy. When dietary fat is used for energy, it is broken down in the liver and metabolized by mitochondria. Body fat is also broken down in the liver, but it is first converted into triglycerides. Triglycerides are then transported to adipose tissue where they are metabolized by enzymes to release fatty acids, which can be used for energy.

Your mouth and stomach

Your mouth and stomach are the first organs to come into contact with food. The process of digestion begins here, as your teeth chew food and your stomach acids break it down.

Your small intestine is where most of the work of digestion takes place. Here, enzymes from your pancreas break down carbohydrates, proteins, and fats. These nutrients are then absorbed through the walls of your small intestine into your bloodstream.

Once in your bloodstream, nutrients are transported to all the cells in your body that need them. Fatty acids and glycerol from triglycerides are used for energy or stored in fat cells. Amino acids from proteins are used to build new proteins or used for energy. And finally, glucose from carbohydrates is used for energy or stored as glycogen.

Your small intestine


Your small intestine is the workhorse of fat digestion. It’s a long, coiled tube that’s about 20 feet long and 1.5 inches in diameter. The small intestine is divided into three sections: the duodenum, jejunum, and ileum. Each section has a different role in fat digestion.

The duodenum is the first section of the small intestine. It’s where most chemical digestion takes place. Enzymes from the pancreas and bile from the liver break down fats into small droplets so that they can be absorbed into the bloodstream.

The jejunum is the middle section of the small intestine. It’s where most of the fat absorption takes place. Fat droplets are absorbed into the cells lining the jejunum and then transported to the lymphatic system for further processing.

The ileum is the last section of the small intestine. It absorbs vitamins and minerals from food, as well as any remaining fat particles not yet absorbed by the jejunum.

Absorption and transport

When you eat fat, it is broken down into smaller pieces by enzymes in your mouth and stomach. Then, it travels to your small intestine, where it is emulsified by bile from your liver and further broken down by pancreatic enzymes. Finally, it is absorbed into the lymphatic system and transported to your bloodstream, where it is used for energy or stored as body fat.


When you consume fat, your body begins the process of breaking it down in your mouth and stomach. Enzymes in your saliva and stomach acids start to break down the fat into smaller molecules. From there, the fat moves into your small intestine, where it is further broken down and absorbed into the bloodstream.

Once the fat is in the bloodstream, it is transported to different tissues and cells in the body to be used for energy. Fat is a great source of energy for the body, and can be used to power many different bodily processes.


It’s interesting to think about how our bodies process the fat we consume. It’s a long process that starts in our mouths and stomachs and ends with absorption and transport into our cells. Once the fat is in our cells, it can be used for energy or stored for future use. Our bodies are amazing machines that are constantly working to keep us healthy and function properly.

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