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Taking Out Sugar from the diet: Observations - Page 2

post #16 of 20
Quote:
Originally Posted by Gibonius View Post


That's under steady state though. If I'm reading the schemes correctly (which would follow what my textbook is saying), you can still get to glucose so long as you have other intermediates available, which you would in a fed state (even without carb intake). You wouldn't be able to generate glucose solely from body fat (starvation conditions), but never meant to imply that was possible.

Might be missing something, never looked at this beyond the textbook level.

By steady state they mean they're not adding enzymes of the glyoxylate shunt.

We're sort of on the same page though. You can get Amino Acid conversion into sugars, but that's not the same as converting fats into sugars. It would be energetically silly to go to the process of converting fats into sugars when you can already utilize fats as an energy source directly.

If you're going to the trouble of turning amino acids into glucose it means you've run out of glycogen and glucose, and would be using as much fats as you have as an energy source.

tldr amino acids can be converted into sugar, not fats.

but all semantics really./
post #17 of 20
Quote:
Originally Posted by hendrix View Post


By steady state they mean they're not adding enzymes of the glyoxylate shunt.

We're sort of on the same page though. You can get Amino Acid conversion into sugars, but that's not the same as converting fats into sugars. It would be energetically silly to go to the process of converting fats into sugars when you can already utilize fats as an energy source directly.

If you're going to the trouble of turning amino acids into glucose it means you've run out of glycogen and glucose, and would be using as much fats as you have as an energy source.

tldr amino acids can be converted into sugar, not fats.

but all semantics really./

Well, as you said earlier, the brain doesn't run at full capacity on ketone bodies and I know that's only an issue during starvation. I suppose that's because you get the majority of your energy requirement from ketone bodies from fats, and then the small amount of glucose needed for the brain from amino acids.

Either way, point stands that you don't need to actually eat any carbs to run at full capacity, yes? Good to brush up on this stuff, has been a while.
post #18 of 20
Quote:
Originally Posted by Gibonius View Post


Either way, point stands that you don't need to actually eat any carbs to run at full capacity, yes? Good to brush up on this stuff, has been a while.

yeah i guess so with a bit of amino acids.

Yeah good old first year biochem, if only they provided a bit of functionally relevant discussions (like this) I would've found it so much easier to remember all those damn pathways.
post #19 of 20
I think that is a common feeling people experience when he/she stop eating sugars - more even energy, no afternoon snooze, less depressed, etc . Recall reading a few testimonials on Tom Naughton's sight about others that cut out carbs from their diet this morning.

"Weekend Mail"

http://www.fathead-movie.com/index.php/2011/09/10/weekend-mail/
post #20 of 20
Quote:
Originally Posted by Sunnydale View Post

I think that is a common feeling people experience when he/she stop eating sugars - more even energy, no afternoon snooze, less depressed, etc . Recall reading a few testimonials on Tom Naughton's sight about others that cut out carbs from their diet this morning.

"Weekend Mail"

http://www.fathead-movie.com/index.php/2011/09/10/weekend-mail/

There's a pretty big difference between cutting sugar and cutting out all carbs. It's pretty hard to be seriously active without eating carbs (don't need too much, but some anyway), but nobody really needs sugar.
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