Raw Fish Lower In Efa Than Cooked Or Broiled

[Luann]

The relative health of an Asian culture that consumed decent amounts of unsaturated fats, fish especially, is pretty interesting. They're known for eating raw fish, which according to these studies is a bit lower in EFAs. granted Asians are pretty new to canola and other seed oils, which has helped their health.

http://fishlarvae.org/wp-content/uploads/2013/10/Neff-et-al-2014.pdf

This one just shows a small unsaturated-fat increase in a species due to cooking.

http://www.omega3galil.com/wp-content/uploads/2014/07/omega-3-in-cooked-fish.pdf

 

[Luann]

Kinda cool, this study documents the opposite effect when the cooking method is grilling

Effects of grilling on cholesterol oxide formation and fatty acids alterations in fish

 

[Travis]

So what happens? Does the double-bond oxidize, forming two short-chain hydroperoxides that subsequently leak out of the fish onto the grill?

Did they even attempt to discover the fate of the missing oils?

 

[Luann]

It did not say! Well, there are three different studies here, on three different kinds of fish. So take what you will. It seemed there was a trend in baking and boiling and pufa retention, while open-air methods like grilling actually let some pufa decrease in the food. Would be interesting to understand how.

 

[Travis]

Here are smoke points of some oils: Smoke point - Wikipedia, the free encyclopedia

Looks like the more unsaturated, the lower the smoke point, and some are only between 200-300 degrees.

I suppose some of the fish oil could be vaporized, and some could leak out and drip.

 

[lvysaur]

The relative health of an Asian culture that consumed decent amounts of unsaturated fats, fish especially, is pretty interesting. They're known for eating raw fish, which according to these studies is a bit lower in EFAs. granted Asians are pretty new to canola and other seed oils, which has helped their health.

https://www.sciencedaily.com/releases/2016/03/160329184939.htm

This study shows that different peoples have genetically adapted to different levels of PUFA. Of course, the study blames it on the politically correct boogeyman of "animal products" and promotes a plant diet, but they ignore the highly saturated fat profile of tropical plants and animals, not to mention ruminants/dairy, which the people of India and many parts of Africa traditionally had abundant access to. Anyone familiar with Peat can see that the effect of latitude (a proxy for PUFA levels in traditionally available food) is being conspicuously ignored here, perhaps purposefully.

The figures for the "Asian" group show that they have a slightly lower incidence of "PUFA tolerance" genes than Europeans, but this is not controlled for latitude, since westerners group all "Asians" (Japanese, Chinese, Thai, Malaysians, sometimes even Indians) together into a meaningless category. If we saw a breakdown for northern Asia (Korea, Japan, Siberia, etc.), they would likely have an even higher PUFA tolerance than Europeans. The Inuit in particular are shown to have better tolerance to marine PUFAs than Europeans in the actual paper.

 

[tyw]

https://www.sciencedaily.com/releases/2016/03/160329184939.htm

This study shows that different peoples have genetically adapted to different levels of PUFA. Of course, the study blames it on the politically correct boogeyman of "animal products" and promotes a plant diet, but they ignore the highly saturated fat profile of tropical plants and animals, not to mention ruminants/dairy, which the people of India and many parts of Africa traditionally had abundant access to. Anyone familiar with Peat can see that the effect of latitude (a proxy for PUFA levels in traditionally available food) is being conspicuously ignored here, perhaps purposefully.

The figures for the "Asian" group show that they have a slightly lower incidence of "PUFA tolerance" genes than Europeans, but this is not controlled for latitude, since westerners group all "Asians" (Japanese, Chinese, Thai, Malaysians, sometimes even Indians) together into a meaningless category. If we saw a breakdown for northern Asia (Korea, Japan, Siberia, etc.), they would likely have an even higher PUFA tolerance than Europeans. The Inuit in particular are shown to have better tolerance to marine PUFAs than Europeans in the actual paper.

I will post some excerpts from what I think is the best PUFA overview out there.

Please don't share the link outside RayPeatForum plz.

In short -- yes, propensity to dispose off or incorporate PUFA into membranes is highly variable across people.

....

 

[jaa]

I will post some excerpts from what I think is the best PUFA overview out there.

Please don't share the link outside RayPeatForum plz.

In short -- yes, propensity to dispose off or incorporate PUFA into membranes is highly variable across people.

....

Sneaky tucking that away in the misc folder on your page. No wonder I didn't get the update!

 

[Travis]

Nice link. It is worth reading, but the author apparently isn't a Gilbert Ling fan and talks of membrane pumps as though they were real!

But certainly worth reading. You cannot expect everyone to have crossed paths with Ling's work.

 

[m_arch]

I will post some excerpts from what I think is the best PUFA overview out there.

Please don't share the link outside RayPeatForum plz.

In short -- yes, propensity to dispose off or incorporate PUFA into membranes is highly variable across people.

....

D: Cool post Yew!