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Calorie restriction, a diet high in nutrients but low in cal

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Calorie restriction, a diet high in nutrients but low in cal [#permalink]

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26 Aug 2007, 12:23
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Calorie restriction, a diet high in nutrients but low in calories, is known to prolong the life of rats and mice by preventing heart disease, cancer, diabetes, and other diseases. A six-month study of 48 moderately overweight people, who each reduced their calorie intake by at least 25 percent, demonstrated decreases in insulin levels and body temperature, with the greatest decrease observed in individuals with the greatest percentage change in their calorie intake. Low insulin level and body temperature are both considered signs of longevity, partly because an earlier study by other researchers found both traits in long-lived people.

If the above statements are true, they support which of the following inferences?

(A) Calorie restriction produces similar results in humans as it does in rats and mice.

(B) Humans who reduce their calorie intake by at least 25 percent on a long-term basis will live longer than they would have had they not done so.

(C) Calorie intake is directly correlated to insulin level in moderately overweight individuals.

(D) Individuals with low insulin levels are healthier than individuals with high insulin levels.

(E) Some individuals in the study reduced their calorie intake by more than 25 percent.
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12 Jul 2009, 01:39
Confused between C & E
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12 Jul 2009, 03:31
True. I would go with E.

Why not C >> there is no mention that calorie intake is 'directly' related to lower insulin levels. It might be possible that lower intake reduces metabolism and this in turn causes lower insulin levels.

Why E >> each reduced their calorie intake by atleast 25%. Now it might be possible that all reduced their intake by 'exactly' 25%. But reading further the stem says that there was a variance in insulin based on percentage intake...and hence..some people should have definitely reduced intake by more than 25%, only then comparison is possible.

pm4553 wrote:
Confused between C & E
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12 Jul 2009, 11:35
trainspotting wrote:
Calorie restriction, a diet high in nutrients but low in calories, is known to prolong the life of rats and mice by preventing heart disease, cancer, diabetes, and other diseases. A six-month study of 48 moderately overweight people, who each reduced their calorie intake by at least 25 percent, demonstrated decreases in insulin levels and body temperature, with the greatest decrease observed in individuals with the greatest percentage change in their calorie intake. Low insulin level and body temperature are both considered signs of longevity, partly because an earlier study by other researchers found both traits in long-lived people.

If the above statements are true, they support which of the following inferences?

A. Calorie restriction produces similar results in humans as it does in rats and mice.
B. Humans who reduce their calorie intake by at least 25 percent on a long-term basis will live longer than they would have had they not done so.
C. Calorie intake is directly correlated to insulin level in moderately overweight individuals.
D. Individuals with low insulin levels are healthier than individuals with high insulin levels.
E. Some individuals in the study reduced their calorie intake by more than 25 percent.

I think I would go with (E), for it is the least disputable claim. The original info states that everyone reduced C-intake by at least 25%. However, greatest changes resulted with the greatest percentage change in C-intake. This implies that not everyone's C-intake reduction level was the same. & since a intake reduction of less than 25% is impossible, some individuals must have reduced C-intake by more than 25%.
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13 Jul 2009, 09:52
E
A. Calorie restriction produces similar results in humans as it does in rats and mice.
No mention of insulin levels etc. in rats so not very similar

B. Humans who reduce their calorie intake by at least 25 percent on a long-term basis will live longer than they would have had they not done so.
It might be true but not enough evidence

C. Calorie intake is directly correlated to insulin level in moderately overweight individuals.
No, i think it is correlated to all individuals and the study never said about not being correlated to thinner people

D. Individuals with low insulin levels are healthier than individuals with high insulin levels.
Maybe.

E. Some individuals in the study reduced their calorie intake by more than 25 percent.
The passage mentioned ind. reducing diet by at least 25% so isn't this just reiterating it?
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13 Jul 2009, 10:26
E survives.
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14 Jul 2009, 06:47
E is the OA...
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19 Apr 2010, 06:22
Confused b/w C and E.

Question is about Inference, an unstated premise, which can be draw from the premises given in the argument. But, E is already mentioned in the argument. So, how can it be the OA?

Now read this - A six-month study of 48 moderately overweight people, who each reduced their calorie intake by at least 25 percent,

C says - Calorie intake is directly correlated to insulin level in moderately overweight individuals.

C is not bringing new elements and its in the context. So, I think this should be the OA.
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26 May 2010, 11:30
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28 May 2010, 13:32
I will go with (E) because that can be inferred with confidence.
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08 Oct 2010, 11:28
It means that lower calorie foods are better and safer. It is better for those who really want to reduce weights. Lower calories might really prolong life.
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23 Jun 2011, 20:06
will go with E...
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24 Jun 2011, 18:50
E by POE.
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25 Jun 2011, 06:56
E it is. Others are not supported by the fact in the statements
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Re: Calorie restriction, a diet high in nutrients but low in [#permalink]

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01 Dec 2011, 02:10
E should be the answer since this is the only choice that can inferred from the question without any doubt.
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Re: Calorie restriction, a diet high in nutrients but low in [#permalink]

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10 Dec 2011, 03:18
E must be the correct answer as it was mentioned in the passage.
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Re: Calorie restriction, a diet high in nutrients but low in [#permalink]

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12 Dec 2011, 06:17
I too Vote for E but the option B is tempting me can anyone justify Please.........

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Re: Calorie restriction, a diet high in nutrients but low in cal [#permalink]

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11 Jun 2013, 06:26
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I have negated option 'C' because
it is generalizing all moderately overweight people,
where as we have only information about 48 people,who have been considered for study
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Re: Calorie restriction, a diet high in nutrients but low in cal [#permalink]

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22 Jul 2013, 02:14
went with E.

I must admit this question had a lot of close calls that can be argued either way!
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Re: Calorie restriction, a diet high in nutrients but low in cal [#permalink]

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22 Jul 2013, 02:15
Inference questions are tricky, by defination of GMAT inference, they are suppose to be the easy ones!
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Re: Calorie restriction, a diet high in nutrients but low in cal [#permalink]

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25 Aug 2013, 14:15
Piter wrote:
Calorie restriction, a diet high in nutrients but low in calories, is known to prolong the life of rats and mice by preventing heart disease, cancer, diabetes, and other diseases. A six-month study of 48 moderately overweight people, who each reduced their calorie intake by at least 25 percent, demonstrated decreases in insulin levels and body temperature, with the greatest decrease observed in individuals with the greatest percentage change in their calorie intake. Low insulin level and body temperature are both considered signs of longevity, partly because an earlier study by other researchers found both traits in long-lived people.

If the above statements are true, they support which of the following inferences?

(A) Calorie restriction produces similar results in humans as it does in rats and mice.

(B) Humans who reduce their calorie intake by at least 25 percent on a long-term basis will live longer than they would have had they not done so.

(C) Calorie intake is directly correlated to insulin level in moderately overweight individuals.

(D) Individuals with low insulin levels are healthier than individuals with high insulin levels.

(E) Some individuals in the study reduced their calorie intake by more than 25 percent.

E, beucase there is no way to lower calorie intake exactly by 25% (there is always a +/- tolerance).
Re: Calorie restriction, a diet high in nutrients but low in cal   [#permalink] 25 Aug 2013, 14:15

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