Diet, Nutrition and SupplementationPost here for supplement reviews or nutritional advice. If you're trying to get "ripped abz" THIS is where you should be.
I've found that pubmed is too much of a chore to dig through. I recently found this link, and although I was skeptical at first, I found a TON of great info:
Figured that was coming. It would be so much easier if someone could just back up the information rather than going through tons of articles at pubmed. I don't even know what to type in to find that topic of information.
Last edited by LiFeIsGoOd : 09-24-2009 at 09:47 PM.
I've found that pubmed is too much of a chore to dig through. I recently found this link, and although I was skeptical at first, I found a TON of great info:
Figured that was coming. It would be so much easier if someone could just back up the information rather than going through tons of articles at pubmed. I don't even know what to type in to find that topic of information.
No need to predigest. Primary sources are wonderful.
If anyone is interested in more details about the topic of this thread go read Alan's responses on the blog where I read the statement that led me to start this thread. The URL to the post is in one of Lyrica's posts on page 1. He did a great job of "schoolin" in a very friendly and supportive way.
If anyone is interested in more details about the topic of this thread go read Alan's responses on the blog where I read the statement that led me to start this thread. The URL to the post is in one of Lyrica's posts on page 1. He did a great job of "schoolin" in a very friendly and supportive way.
it's true that the body isn't very good at making fat from carbs. It rather uses the carbs and stores the dietary fat as fat. But from that information all sorts of crazy stuff has risen. Say your maintenance is 3000kcal, then you eat 2000kcal fat and 2000kcal carbs. you'll use up the carbs and 1000kcal of the fat, and 1000kcal of the fat will be stored. Reduce your carbs to 1000, you'll use 1000 of the carbs and 2000 of the fat.
I omitted protein for clarity and of course, this is just the conceptual side of it, it's not written in stone, sure, some of the carbs will probably be stored, etc, but in the big picture you will usually use the carbs you ingest because de novo fat synthesis (making fat from carbs) in humans isn't very good. So if you eat more carbs, you'll store more of the fat you eat (assuming you're in a calorie surplus). If you were to eat only carbs, then maybe your maintenance would go up a bit (maybe your systems would drive your body to more activity to burn off the extra carbs, or what ever... maybe de novo fat synthesis would shoot through the roof in a situation like that, I dunno, but no one eats only carbs. If you do that, you die.
yeah, I'm pretty sure, but like cycomiko said, it's a simplistic view of whats going on. It's not quite as simple as that and I must admitt that de novo lipogenesis is not the subject in nutrition I have read the most about.
When you overeat carbs, though, de novo lipogenesis will go up a bit and you will make some fat from it, but it's very energy expensive, but still, people who overeat with a lot of carbs don't get as fat as people who overeat with a lot of fat. At least if we are to believe this abstract:http://www.ajcn.org/cgi/content/abstract/62/1/19
I haven't read the full text yet nor many other studies, so I don't know if this is supported elsewhere.
However, overeating with a lot of carbs, thus increasing lipogenesis, can also lead to increased triglyceride levels: http://www.ajcn.org/cgi/content/abstract/77/1/43
Another abstract I found.. not read the full text yet.. or checked to see if the rest of pubmed agrees.
So if you are to overeat, if you overeat carbs you'll get fat slower, but you'll die sooner, if you overeat fat, you'll get fat quicker, but die later.
It would be cool if someone who has read up on this subject wanted to post their opinion, or link some good review articles on the subject. I'm heading off to uni now, so I'm gonna do some searching, but my search skills aren't always the best.
I'm a pubmed cowboy
and I don't need proof
I just read the abstracts
and I quote 'em to you
(sung to the tune of "I'm poor a lonesome cowboy")
yeah, I'm pretty sure, but like cycomiko said, it's a simplistic view of whats going on. It's not quite as simple as that and I must admitt that de novo lipogenesis is not the subject in nutrition I have read the most about.
When you overeat carbs, though, de novo lipogenesis will go up a bit and you will make some fat from it, but it's very energy expensive, but still, people who overeat with a lot of carbs don't get as fat as people who overeat with a lot of fat. At least if we are to believe this abstract:http://www.ajcn.org/cgi/content/abstract/62/1/19
I haven't read the full text yet nor many other studies, so I don't know if this is supported elsewhere.
However, overeating with a lot of carbs, thus increasing lipogenesis, can also lead to increased triglyceride levels: http://www.ajcn.org/cgi/content/abstract/77/1/43
Another abstract I found.. not read the full text yet.. or checked to see if the rest of pubmed agrees.
So if you are to overeat, if you overeat carbs you'll get fat slower, but you'll die sooner, if you overeat fat, you'll get fat quicker, but die later.
It would be cool if someone who has read up on this subject wanted to post their opinion, or link some good review articles on the subject. I'm heading off to uni now, so I'm gonna do some searching, but my search skills aren't always the best.
I'm a pubmed cowboy
and I don't need proof
I just read the abstracts
and I quote 'em to you
(sung to the tune of "I'm poor a lonesome cowboy")
Good stuff. Important note in that second article:
Quote:
"Our low-fat, high-carbohydrate diet matched the
proportions of fat and carbohydrate used previously by Parks et
al (11); however, the ratio of simple to complex carbohydrates
in the present study was 54:46, compared with 40:60 in the
study by Parks et al. In the present study, this higher proportion
of simple sugars (54%) led to elevated fractional hepatic DNL,
whereas when only 40% of the carbohydrate consisted of simple
sugars, hepatic DNL was minimal (11).
In this study, we showed that hyperinsulinemic obese subjects have high
hepatic DNL under a dietary condition (high-fat diet) in which
normoinsulinemic subjects have no DNL. We also found that
when normoinsulinemic and hyperinsulinemic subjects consume
a low-fat, high-carbohydrate diet with more than half of the carbohydrate in the form of simple sugars, hepatic DNL is high and
triacylglycerol concentrations are increased."
I guess when you're eating 55% of your carbs from simple sugars, that makes a big difference. Even a reduction to 40%, which is still pretty high IMO, leads to minimal DNL. The study was also with a 68% CHO diet. Granted, we are talking about a "high carb" diet here, but I can't see anyone ever getting that high unintentionally. Seems like the effect was only really in previously hyperinsulinemic subjects and/or those consuming more than half of their carbohydrates from simple sugars (~37% of their total caloric intake to be exact).
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