Feasting &Fasting
Start
Macronutrient Review
Carbohydrates are broken down to glucose and used by cells for energy. Fat is broken down to fatty acids, and some can be used immediately for energy. Protein is broken down to amino acids and utilized for its many functions in the body (but is not used as energy).
Next
Feasting
Eating more than we need
Excess glucose is first stored in liver and muscles. Once full, glucose is converted to triglycerides and stored in adipose (fat) cells. Excess fatty acids are repackaged as triglycerides and stored in adipose (fat) cells. Excess amino acids are dismantled, the nitrogen is removed and excreted, wasted, and the remaining fragments are converted to triglycerides and stored in adipose (fat) cells.
Next
Initial Fast
During an initial fast, carbohydrates stored as glycogen in the liver and muscles will be broken down to glucose and released in the bloodstream to be used as energy by cells.
Fat stored as triglycerides in adipose cells will be broken down to fatty acids and utilized by cells for energy.
Next
Prolonged Fast
More than 24 hours
In a prolonged fast, the body has exhausted its stores of glycogen. Stored triglycerides will still be used for energy. Body proteins will be broken down to amino acids and converted to glucose to be used by cells for energy. The brain needs glucose for energy.
Next
Prolonged Fast
More than 24 hours
Body proteins will also be broken down to amino acids and converted to ketones. Triglycerides will be converted to ketones. The ketones will be used as energy. It takes the body a number of days to efficiently convert protein to ketones. The brain can also use ketones for energy.
Feasting &Fasting
Chris Dob
Created on November 7, 2025
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Transcript
Feasting &Fasting
Start
Macronutrient Review
Carbohydrates are broken down to glucose and used by cells for energy. Fat is broken down to fatty acids, and some can be used immediately for energy. Protein is broken down to amino acids and utilized for its many functions in the body (but is not used as energy).
Next
Feasting
Eating more than we need
Excess glucose is first stored in liver and muscles. Once full, glucose is converted to triglycerides and stored in adipose (fat) cells. Excess fatty acids are repackaged as triglycerides and stored in adipose (fat) cells. Excess amino acids are dismantled, the nitrogen is removed and excreted, wasted, and the remaining fragments are converted to triglycerides and stored in adipose (fat) cells.
Next
Initial Fast
During an initial fast, carbohydrates stored as glycogen in the liver and muscles will be broken down to glucose and released in the bloodstream to be used as energy by cells. Fat stored as triglycerides in adipose cells will be broken down to fatty acids and utilized by cells for energy.
Next
Prolonged Fast
More than 24 hours
In a prolonged fast, the body has exhausted its stores of glycogen. Stored triglycerides will still be used for energy. Body proteins will be broken down to amino acids and converted to glucose to be used by cells for energy. The brain needs glucose for energy.
Next
Prolonged Fast
More than 24 hours
Body proteins will also be broken down to amino acids and converted to ketones. Triglycerides will be converted to ketones. The ketones will be used as energy. It takes the body a number of days to efficiently convert protein to ketones. The brain can also use ketones for energy.