3 ms·
Fructose is definitely a carb. It's not a direct reactant in Kreb's cycle, but there are plenty of ways to move fructose through the metabolic pathways so the o
by killjoywashere 6y ago
Fructose is definitely a carb. It's not a direct reactant in Kreb's cycle, but there are plenty of ways to move fructose through the metabolic pathways so the oxidation of those carbons results in the production of ATP.
Also, I wouldn't use "It can only be metabolized by the liver" as evidence of fructose's carbohydrate status: a) that has nothing to do with the definitions, and the statement is true for a very large number of molecules.
- ravar 6y agoEmphasis on my wording, functionally not a carb. Its not treated how carbs normally are.
- just-juan-post 6y agoCould you elaborate? I'm reading this on wikipedia: > Under one percent of ingested fructose is directly converted to plasma triglyceride.[2] 29% - 54% of fructose is converted in liver to glucose, and about a quarter of fructose is converted to lactate. 15% - 18% is converted to glycogen.[3] Glucose and lactate are then used normally as energy to fuel cells all over the body. https://en.wikipedia.org/wiki/Fructolysis https://en.wikipedia.org/wiki/Fructolysis
- ravar 6y agoI can't find my source[1], but the amount of fructose converted to glucose is highly dose dependent. Over 30 grams (if i remember correctly) it basically all gets shunted to fat. edit: [1]https://onlinelibrary.wiley.com/doi/pdf/10.1111/joim.12993 https://onlinelibrary.wiley.com/doi/pdf/10.1111/joim.12993