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Is ketosis really the "backup" system?
Ignoramus16674" wrote in message
... They say that burning carbs is the "primary" system of getting energy, and burning fat is secondary. I am curious what is the basis for putting one first and another second. I'm inclined to agree with you on this issue. I think glucose may be the backup system... Peace, Pen |
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On Tue, 17 Aug 2004 13:12:15 -0400, Penelope Baker
wrote: Ignoramus16674" wrote in message ... They say that burning carbs is the "primary" system of getting energy, and burning fat is secondary. I am curious what is the basis for putting one first and another second. I'm inclined to agree with you on this issue. I think glucose may be the backup system... Peace, Pen It's probably based on that if you eat carbs, you'll burn carbs before you burn ketones (and likely won't be in or will be kicked out of ketosis anyway). Now, which one was more prevalent in the past, I'd say in winter ketosis and in summer carbs. -- Bob in CT Remove ".x" to reply |
#3
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Ignoramus16674 writes: They say that burning carbs is the "primary" system of getting energy, and burning fat is secondary. I am curious what is the basis for putting one first and another second. If you eat both, your body burns the carbs and stores the fats. The only time it's the other way is if you're following a cyclic diet like UD2 and you're going from ketosis and full glycogen depletion to a high-mostly-carb post-workout repletion, in which case it will use the carbs for glycogen and continue burning fat. But, that's a forced anomaly that only lasts a short time. |
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Ignoramus16674 writes: They say that burning carbs is the "primary" system of getting energy, and burning fat is secondary. I am curious what is the basis for putting one first and another second. If you eat both, your body burns the carbs and stores the fats. The only time it's the other way is if you're following a cyclic diet like UD2 and you're going from ketosis and full glycogen depletion to a high-mostly-carb post-workout repletion, in which case it will use the carbs for glycogen and continue burning fat. But, that's a forced anomaly that only lasts a short time. |
#5
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Ignoramus16674 wrote:
:: They say that burning carbs is the "primary" system of getting :: energy, and burning fat is secondary. I am curious what is the basis :: for putting one first and another second. IMO, the basis is nothing more than the fact that the body will burn (use) carbs first and easier than it will fat. But, note that the body will burn alcohol before carbs, and alcohol is supposedly toxic to the body. So, it could be that carbs are toxic too, at least in large amounts. |
#6
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I think that it was possibly believed that since carbs are used up faster
than fats, that it must be the primary or prefered source of energy. It seems to me that if a natural diet is followed, it would be tough to get enough carbs from plants other than fruits which would have been seasonal. To figure out which is "our" primary fuel source would be based on a different question. Were we basically meat eaters that supplemented our diet with plants when meat was unavailable, or were we plant eaters that evolved over time to get our energy from meat using an existing process that breaks down fat from nuts? If we could determine what is our true food source, it would be easier to answer what our primary energy source is. I have read though, that we can survive on only meat, but would have great difficulty surviving on only plants. Tom 210/180/180 ----------------------------------------------------------- "Ignoramus16674" wrote in message ... They say that burning carbs is the "primary" system of getting energy, and burning fat is secondary. I am curious what is the basis for putting one first and another second. i |
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Roger Zoul wrote:
Ignoramus16674 wrote: :: They say that burning carbs is the "primary" system of getting :: energy, and burning fat is secondary. I am curious what is the basis :: for putting one first and another second. IMO, the basis is nothing more than the fact that the body will burn (use) carbs first and easier than it will fat. But, note that the body will burn alcohol before carbs, and alcohol is supposedly toxic to the body. So, it could be that carbs are toxic too, at least in large amounts. It's interesting that when you get into the chemistry, ketones are the only fuel. Both fat and glucose get converted to ketones before getting burned. That makes ketones the primary fuel. Fat, carb, protein, all of those are just secondary sources of the primary fuel. It's about as valid as calling carbs primary because they are second in line after acetate/alcohol. |
#8
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Penelope Baker generously shared with us this little ditty:
Ignoramus16674" wrote in message ... They say that burning carbs is the "primary" system of getting energy, and burning fat is secondary. I am curious what is the basis for putting one first and another second. I'm inclined to agree with you on this issue. I think glucose may be the backup system... I'm inclined to think of it as 'bonus' energy. As in: You've got a chance at the bonus round Bob you lucky dog you... bannanas or pears? -- revek Grant me the serenity to accept the things I cannot change, the courage to change the things I can and the wisdom to hide the bodies of the people I had to kill because they ****ed me off. |
#9
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Roger Zoul generously shared with us this little ditty:
Ignoramus16674 wrote: They say that burning carbs is the "primary" system of getting energy, and burning fat is secondary. I am curious what is the basis for putting one first and another second. IMO, the basis is nothing more than the fact that the body will burn (use) carbs first and easier than it will fat. But, note that the body will burn alcohol before carbs, and alcohol is supposedly toxic to the body. So, it could be that carbs are toxic too, at least in large amounts. Very good point. Gee, I wonder why dieticians/nutritionists never bring *that* one up? -- revek This .sig may not be reproduced, in whole or in part, by any means, including but not limited to: Mechanical reprints, electronic storage or scanning, theatrical release, musical ballads, word of mouth, sign language, braille, pantomime, hetero- or asexual reproduction, genetic engineering, or inclusion in other .sigs. |
#10
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Tom generously shared with us this little ditty:
I think that it was possibly believed that since carbs are used up faster than fats, that it must be the primary or prefered source of energy. It seems to me that if a natural diet is followed, it would be tough to get enough carbs from plants other than fruits which would have been seasonal. To figure out which is "our" primary fuel source would be based on a different question. Were we basically meat eaters that supplemented our diet with plants when meat was unavailable, or were we plant eaters that evolved over time to get our energy from meat using an existing process that breaks down fat from nuts? If we could determine what is our true food source, it would be easier to answer what our primary energy source is. I have read though, that we can survive on only meat, but would have great difficulty surviving on only plants. Tom 210/180/180 Check out our teeth and gut. They give good clues. We (homo sapiens sapiens) have evolved to eat primarily fish--other meats being not as good for us I don't think, and supplementing on plants. (I lean toward the aquatic ape theory as at least possible). -- revek Grant me the serenity to accept the things I cannot change, the courage to change the things I can and the wisdom to hide the bodies of the people I had to kill because they ****ed me off. |
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