Obesity under the MOST controlled conditions

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Obesity under the MOST controlled conditions


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Old 08-28-2013, 16:39   #1
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Default Obesity under the MOST controlled conditions

Chunky Monkey: Lab Animals Are Getting Fatter and Scientists Don

Purina lab chow ... chow chow chow! Carb-based, no doubt ... grain-based, more likely.

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Old 08-28-2013, 16:48   #2
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Originally Posted by foxl View Post
Chunky Monkey: Lab Animals Are Getting Fatter and Scientists Don

Purina lab chow ... chow chow chow! Carb-based, no doubt ... grain-based, more likely.
Peter calls it crap-in-a-bag.

Duh! These are "scientists"?!

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Old 08-28-2013, 16:52   #3
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Peter calls it crap-in-a-bag.

Duh! These are "scientists"?!
Is this Dr. Attia?

STILL .... "Whatever the case may be, scientists believe attributing obesity to personal responsibility is simplistic."

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Old 08-28-2013, 16:57   #4
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Is this Dr. Attia?

STILL .... "Whatever the case may be, scientists believe attributing obesity to personal responsibility is simplistic."
No, Peter of the Hyperlipid blog.

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Old 08-28-2013, 18:00   #5
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Chunky Monkey: Lab Animals Are Getting Fatter and Scientists Don

Purina lab chow ... chow chow chow! Carb-based, no doubt ... grain-based, more likely.
There's nothing in that article or the Aeon article that I could see that points out one glaring problem: lab animals are not always fed controlled diets. Many studies will list diet as ad libidum, or at will, meaning there was food available and the animals ate as much of it as they wanted. This article and the study referenced are not by any stretch of the imagination pointing to 'controlled conditions.' In animal studies as in human studies, sometimes diet is controlled and sometimes, in fact often times in human studies, it isn't. So in reality these articles were written by people who flat out don't know what they are writing about. If that study is to hold any weight, and I couldn't find it other than behind a paywall so if someone has a link I'd appreciate it, it would have to confirm the control conditions for the diets of the animal populations involved. And it's not hard to see how animals, especially those living in close proximity to human population centers, would have increased access to easy food seeing as how much food simply gets thrown out.

Here's a link to a Scientific American article which is more balanced, note the quote at the end:

Quote:
The current study, however, is not rigorous enough to pinpoint whether such factors were responsible, he says. "I think it's worthwhile to do such a study in a systematic way," he says.

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Old 08-28-2013, 18:07   #6
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CDB I suspect ad libitum refers to AMOUNT, not compostion.

I had to weight the food bowls, full, and empty, and in fact pick up food spillage and weigh it, too on the groups I studied.

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Old 08-28-2013, 18:18   #7
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No, Peter of the Hyperlipid blog.
Petro Dobromylskyj - commonly known as Peter.




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Old 08-28-2013, 20:08   #8
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CDB I suspect ad libitum refers to AMOUNT, not compostion.

I had to weight the food bowls, full, and empty, and in fact pick up food spillage and weigh it, too on the groups I studied.
Ad libitum can refer to amount or composition. That's how you get studies which look at macro nutrient portions and their effects. For example you could control the macro content but not the overall intake of three populations of rats but allow ad libitum eating in all populations to see the effect the macro content might have on satiety. A result would be observing a statistically significant difference in voluntary food consumption among the populations, which is why you'd have to allow an All You Can Eat situation.

The problem is this seems to be a look at one particular animal population in a toxicology lab, and whether or not their particular set of lab rats were fed controlled diets is something I've been unable to find. And, if their main concern is whether or not the rats get sick or die when exposed to this or that compound, then it wouldn't be surprising if they're controlling for that content alone and not macro or overall calorie intake at all. Not to mention that it's one lab animal population out of who knows how many world wide.

So, it's a small sample with unknown control conditions WRT diet, plus a few billion other confounding factors and uncontrolled variables. Or, in other words, it's virtually worthless in terms of research except in pointing out a possibly interesting trend which could warrant further study. And I write 'possibly' because for all we know if those unknowns are controlled for the trend vanishes or even reverses. It's simply not possible to pull anything of value from a vague, uncontrolled study like this.

But, it makes for great headlines.

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