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can gelatin or fiber convert to glucose?

Answered on August 19, 2014
Created October 02, 2012 at 9:02 PM

can the protein consumed from gelatin be converted into glucose? or is it glycine an amino acid that will go to work on the body? what about fiber? insoluble I would assume cannot become glucose, but what about soluble? can soluble fiber become energy, or can fiber only become fatty acid energy when fermented in the colon?

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2 Answers

1
3ce6a0d24be025e2f2af534545bdd1d7

(26217)

on October 03, 2012
at 12:34 PM

Via gluconeogenesis, the body can make glucose from glycerol, lactate, alanine, pyruvate, and glucogenic amino acids.

We process all fiber (either through fermentation or excretion) faster than the BA that would be necessary for GNG. So I would assume that you cannot utilize soluble fiber as glucose, certainly not at an appreciable amount.

1
A968087cc1dd66d480749c02e4619ef4

(20436)

on October 03, 2012
at 12:15 PM

Protein can be converted into glucose, although some energy is lost. But it is usually only converted if there is a shortage of glucose, such as on a low to very low carb diet. Glycine will be used for many things - cartilage is one, iirc.

Fiber cannot be digested by humans, but soluble fiber can be eaten by bacteria. Short chain fatty acids are a by-product. Even cows don't get energy directly from grass - they eat the bacteria that eats the grass.

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