How do we gain energy out of fat?

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In summary, when the body runs out of glucose, it turns to fat for energy. Fat has more than double the amount of calories per gram compared to carbohydrates. However, converting fat into energy takes longer because it must first be broken down into fatty acids and glycerol. These two components follow separate pathways to ultimately become available as energy. One common saturated fat, palmitic acid, can produce 130 molecules of ATP for every molecule of fat. This process is covered in most Biochemistry textbooks and can be further explored in sources such as the ones provided. Additionally, the oxidation of fats is not only a source of energy but also water, which is often overlooked
  • #1
Physicsrapper
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"When your body runs out of glucose, it turns to fat for energy, which has 9 calories in every gram. This is a little more than double the amount in carbohydrates. Converting fat into energy takes longer than it does to convert glucose into energy, because fat must be first be broken down into its two component parts: fatty acid and glycerol. Each part follows a separate pathway to ultimately become available as energy. One common saturated fat, palmitic acid, makes 130 molecules of ATP for each molecule of fat."

This is all I found about this topic in the internet. Could you please explain it further (how fat is broken down exactly to convert it into energy) or find a source where I can read more about it?
 
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  • #3
This is a topic that is covered in most Biochemistry textbooks (some of which are freely available online). For example, see:
https://www.ncbi.nlm.nih.gov/books/NBK21173/
https://www.ncbi.nlm.nih.gov/books/NBK22581/
 
  • #4
Yes, this is an invitation to write several textbook chapters, which we often get - not efficient to do for one student!

That said, a little fact I like that seems often overlooked, is that the oxidation of fats is the source as well as of energy, of water. The camel's hump is fat, not water
 

1. How does the body use fat for energy?

The body uses fat for energy through a process called lipolysis, where fat cells release stored fatty acids. These fatty acids are then broken down in the liver to produce energy in the form of ATP, which is used by the body's cells for various functions.

2. Can we gain energy from all types of fat?

Yes, we can gain energy from all types of fat, including saturated, monounsaturated, and polyunsaturated fats. However, the body tends to prefer using unsaturated fats for energy as they are easier to break down compared to saturated fats.

3. How does exercise affect our ability to gain energy from fat?

Exercise can increase our ability to gain energy from fat by stimulating the release of hormones that promote lipolysis. Additionally, regular exercise can also increase the number of mitochondria in our cells, which are responsible for breaking down fatty acids for energy.

4. What is the impact of a high-fat diet on our energy levels?

A high-fat diet can lead to an increase in energy levels as the body has a larger pool of fatty acids to use for energy production. However, it is important to note that a diet high in unhealthy fats can also lead to weight gain and other health issues. It is recommended to consume a balanced diet with healthy sources of fat.

5. Can we store excess fat indefinitely for later energy use?

Yes, our bodies have the ability to store excess fat for later energy use. However, if we consistently consume more calories than we burn, the excess fat can lead to weight gain and other health problems. It is important to maintain a healthy balance of caloric intake and exercise to prevent excessive fat storage.

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