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Originally Posted by uncle_el
1. fructose can be converted into glucose (fructose, to fructose 1 phosphate, to glyceraldehyde 3 phosphtate, to fructose 1 6 bisphosphate, to fructose 6 phosphate, to glucose). once converted to glucose, it can be metabolized in the same way that all glucose is.
2. fructose can be metabolized directly by muscles as they have an enzyme, hexokinase, that the liver either does not have, or has it insufficient quantities (depending on the text you read, and whether or not it's about biochemistry or nutrition)... both fructose and glucose are "raw" energy.  |
From what I have heard, from nutritionist, they tend to lean toward the fructose liver argument. The seminar I went to was geared more towards college athletes, and broke down sugar intake about training. According to the speaker after exercise raw glucose after exercise was important for muscle recovery, her suggestion was honey, and fruits and carbs where not as useful as carbs and fructose where not as readily available for use by the muscles. Although I would be interested to see what the actual percentages of Fructose is metabolized in the liver vs. the muscles.
BTW. I skipped biochem and took Advanced Organic for my chem major, though I am debating picking it up.