4

votes

Nuts Slow Down Metabolism?

Answered on August 19, 2014
Created December 06, 2012 at 11:06 PM

So I know there are lots of threads on here wondering why people must cut out nuts to lose weight (myself included). For example why I could lose weight on a tracked 1200 calorie a day diet for a week, and then the next week eat 1200 calories but with 200 calories of nuts substituted for something else in those 1200 calories, and not lose ANYTHING, ALWAYS baffled me. IT MADE NO SENSE! I've read lots of experiences like this on a thread on here that I can't remember the name of. But I just read something interesting on PUFAS that might explain everything to me. PUFAS slow down the metabolism (especially for someone with hypothyroid), and coincidently nuts and vegetable oils have the HIGHEST content of these polyunsaturated fats. This would mean nuts would have the strongest negative effect on metabolism than any other PUFAS. Found this really interesting, and actually explained to me why so many can't lose weight with nuts, even when had in any amount (meaning the recommended 2 T). Anyone have a similar experience and have/ and or just any thoughts on this?

The new research explained that the PUFAs had actually slowed down the metabolism of the PUFA-fed rats, causing a decreased need for nutrients. Thus, this allowed them to not be as nutrient deficient as the fat-free diet rats. The non-PUFA-fed rats had a higher metabolic rate, and with that comes an increase in nutrient demand, especially the B vitamins. And since the demand was not met, the rats became sick. Basically, all Burrs showed was that PUFAs slow your metabolic rate down, allowing you to survive on less nutrients. Thus the PUFAs prevented a deficiency on a deficient diet. Interesting, huh?

via http://sportsnutritioninsider.insidefitnessmag.com/3559/pufas-essential-or-toxic

4bd4e2fe6a095663f80c69656936e487

(744)

on March 04, 2013
at 08:31 PM

I read it but I don't have a link now.

A2c38be4c54c91a15071f82f14cac0b3

(12682)

on March 04, 2013
at 05:16 AM

Posting a link would be helpful, Anon.

4bd4e2fe6a095663f80c69656936e487

(744)

on March 04, 2013
at 04:57 AM

look at the study by Burr which proves the fatty acids are essential. One of his students tried to prove that EFA are essential for humans too, so he went on a low-PUFA diet. Many things were observed, one of them that his metabolism accelerated.

A2c38be4c54c91a15071f82f14cac0b3

(12682)

on December 07, 2012
at 07:55 PM

I don't even think capsaicin is that good at increasing metabolism. Usually the effect is small, as you pointed out, and not statistically significant. Plus the studies use crazy high doses that would be improbable to obtain in real food unless you're that one strange person who can snack on habeneros.

Cbdc8318738324492f2d5918868ce4c9

(1211)

on December 07, 2012
at 02:39 PM

I agree, the PUFA studies seem to be worst-case free PUFA, which seems quite different than PUFA bound in nuts and whole foods.

Medium avatar

(10611)

on December 07, 2012
at 01:02 PM

I recently read about bears migrating seasonally to hazelnut patches. They consumed thousands of calories per day in nuts. Way beyond snack quantities.

F5a0ddffcf9ef5beca864050f090a790

(15515)

on December 07, 2012
at 06:33 AM

Thanks for sharing! A very interesting study indeed!

363d0a0277a8b61ada3a24ab3ad85d5a

(4642)

on December 07, 2012
at 05:27 AM

Yeah the mac nuts thing is weird, I tried it out when doing really high fat, which did feel good overall, and the mac nuts were fine, weight fell off like crazy, though I also wasn't having dairy at the time, which I had usually done before, so that could also have something to do with it (though just dairy low carb did not stall vs. dairy and nuts like almonds did stall).

C23148e16a4dd05351d1902a69097d65

(748)

on December 07, 2012
at 04:51 AM

awhh I'm sorry it really is such a depressing thing :( but interesting about macadamias? good to know! ill have to try those sometime!

C23148e16a4dd05351d1902a69097d65

(748)

on December 07, 2012
at 01:20 AM

probs! I'm just the lucky one haha ;)

C23148e16a4dd05351d1902a69097d65

(748)

on December 07, 2012
at 12:48 AM

true! I hope thats the case. But they always stall me, thought this might be why, for me anyways! Don't know!

C23148e16a4dd05351d1902a69097d65

(748)

on December 07, 2012
at 12:11 AM

yah glad to share! I found it all really interesting/somewhat saddening haha because I lovelovelove them as well. But this finally satisfied my huge curiosity for the whole relation to eating-nuts-and-weight-stall thing, at least for me, and hoped it would for others too if it is true! :)

C23148e16a4dd05351d1902a69097d65

(748)

on December 07, 2012
at 12:11 AM

yah glad to share! I found it all really interesting/somewhat saddening haha because I lovelovelove them as well. But this finally satisfied my huge curiosity for the whole relation to eating-nuts-and-weight-stall, at least for me, and hoped it would for others too if it is true!

C23148e16a4dd05351d1902a69097d65

(748)

on December 07, 2012
at 12:09 AM

yah no problem! I thought others would like to know I found it all really interesting somewhat saddening too haha because I love them as well. But this finally satisfied my huge curiosity for the whole relation to eating-nuts-and-weight-stall, and hoped it would for others too if its true!

Cb9a270955e2c277a02c4a4b5dad10b5

(10989)

on December 06, 2012
at 11:20 PM

Very interesting actually.

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7 Answers

4
A2c38be4c54c91a15071f82f14cac0b3

(12682)

on December 07, 2012
at 01:16 AM

I'm all for avoiding PUFA's, but I have yet to see evidence that they slow the metabolism down in humans. Perhaps they do in very specific contexts (explaining your experience) but not for the average person.

C23148e16a4dd05351d1902a69097d65

(748)

on December 07, 2012
at 01:20 AM

probs! I'm just the lucky one haha ;)

4bd4e2fe6a095663f80c69656936e487

(744)

on March 04, 2013
at 08:31 PM

I read it but I don't have a link now.

A2c38be4c54c91a15071f82f14cac0b3

(12682)

on March 04, 2013
at 05:16 AM

Posting a link would be helpful, Anon.

4bd4e2fe6a095663f80c69656936e487

(744)

on March 04, 2013
at 04:57 AM

look at the study by Burr which proves the fatty acids are essential. One of his students tried to prove that EFA are essential for humans too, so he went on a low-PUFA diet. Many things were observed, one of them that his metabolism accelerated.

3
32f5749fa6cf7adbeb0b0b031ba82b46

(41757)

on December 07, 2012
at 01:14 PM

I'd be curious to know what % of calories as PUFA was being fed in animal models to demonstrate PUFA depression of metabolic rate. I'd wager it was much higher than you'll get in a handful of nuts.

Cbdc8318738324492f2d5918868ce4c9

(1211)

on December 07, 2012
at 02:39 PM

I agree, the PUFA studies seem to be worst-case free PUFA, which seems quite different than PUFA bound in nuts and whole foods.

3
Cb9a270955e2c277a02c4a4b5dad10b5

(10989)

on December 07, 2012
at 01:49 AM

It would make sense to me evolutionarily because: Nuts come into season in the fall. Animals need to gain weight for the winter in the fall. Animals eat nuts in the fall. TF, maybe nuts help animals gain weight in the fall by slowing down their metabolisms.

Medium avatar

(10611)

on December 07, 2012
at 01:02 PM

I recently read about bears migrating seasonally to hazelnut patches. They consumed thousands of calories per day in nuts. Way beyond snack quantities.

3
35deaf0f101526bb113ea69f79934f2b

(436)

on December 07, 2012
at 12:04 AM

Thanks for sharing... really interesting. I LOVE nuts and seeds and nut butters. I actually eat them daily and have never noticed weight retention because of it. I might mess around with eating them some days and avoiding others though and see what happens.

C23148e16a4dd05351d1902a69097d65

(748)

on December 07, 2012
at 12:09 AM

yah no problem! I thought others would like to know I found it all really interesting somewhat saddening too haha because I love them as well. But this finally satisfied my huge curiosity for the whole relation to eating-nuts-and-weight-stall, and hoped it would for others too if its true!

C23148e16a4dd05351d1902a69097d65

(748)

on December 07, 2012
at 12:11 AM

yah glad to share! I found it all really interesting/somewhat saddening haha because I lovelovelove them as well. But this finally satisfied my huge curiosity for the whole relation to eating-nuts-and-weight-stall, at least for me, and hoped it would for others too if it is true!

C23148e16a4dd05351d1902a69097d65

(748)

on December 07, 2012
at 12:11 AM

yah glad to share! I found it all really interesting/somewhat saddening haha because I lovelovelove them as well. But this finally satisfied my huge curiosity for the whole relation to eating-nuts-and-weight-stall thing, at least for me, and hoped it would for others too if it is true! :)

2
Medium avatar

(10611)

on December 07, 2012
at 12:58 PM

Foods don't appreciably change metabolism. They can alter digestion rates and satiety significantly, but the best known example of a food altering metabolism is capsaicin. http://www.livestrong.com/article/349753-cayenne-pepper-and-metabolism/ As I recall from reading other articles, the effect is typically 5 kcal/hr, but is limited to about an hour after consumption. In order to get a noticeable effect you'd have to ingest it continuously.

A2c38be4c54c91a15071f82f14cac0b3

(12682)

on December 07, 2012
at 07:55 PM

I don't even think capsaicin is that good at increasing metabolism. Usually the effect is small, as you pointed out, and not statistically significant. Plus the studies use crazy high doses that would be improbable to obtain in real food unless you're that one strange person who can snack on habeneros.

2
363d0a0277a8b61ada3a24ab3ad85d5a

(4642)

on December 07, 2012
at 02:33 AM

I have had the exact same experience, especially when losing weight. Any amount of nuts, even if under cals or under carbs (if going keto) completely stalls me out, except for macadamias. I am curious about the reasons why, but it is the first to go, though it can be such an easy fix if you're out on the road or only have access to convenience store and you're starving, though now that I don't eat keto, I do have some more options.

C23148e16a4dd05351d1902a69097d65

(748)

on December 07, 2012
at 04:51 AM

awhh I'm sorry it really is such a depressing thing :( but interesting about macadamias? good to know! ill have to try those sometime!

363d0a0277a8b61ada3a24ab3ad85d5a

(4642)

on December 07, 2012
at 05:27 AM

Yeah the mac nuts thing is weird, I tried it out when doing really high fat, which did feel good overall, and the mac nuts were fine, weight fell off like crazy, though I also wasn't having dairy at the time, which I had usually done before, so that could also have something to do with it (though just dairy low carb did not stall vs. dairy and nuts like almonds did stall).

0
86c97b2779feab3c330f5e1c5fea7e25

(2312)

on December 07, 2012
at 12:37 AM

I read before that just because it was tested on rats, does not mean it will be the same for humans...to try and save your hope that nuts miiiight not be bad for weight loss

C23148e16a4dd05351d1902a69097d65

(748)

on December 07, 2012
at 12:48 AM

true! I hope thats the case. But they always stall me, thought this might be why, for me anyways! Don't know!

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