1

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Does all fish oil have "toxic" amounts of VitA in it or just cod liver oil?

Answered on August 19, 2014
Created May 18, 2010 at 2:13 PM

I Know this gets talked about a lot, but I haven't found a specific answer to this question. Thanks!

9d43f6873107e17ca4d1a5055aa7a2ad

on May 19, 2010
at 11:18 PM

Very few are and they have been bred to enhanced vitamin A content. If you go in the wild and look for something like yams or carrots, you will be really disappointed. But only for awhile because then you like other foragers will realize meat and fish are where it's at nutritionally.

15d23403fb836f2b506f4f3ad2c03356

(1219)

on May 19, 2010
at 04:59 PM

What about starchy tubers? They're paleo and are chock full of carotenes.

9d43f6873107e17ca4d1a5055aa7a2ad

on May 19, 2010
at 02:12 AM

It seems ridiculous to think humans should get A from plants given that it's richest in very neolithic vegetables.

9d43f6873107e17ca4d1a5055aa7a2ad

on May 19, 2010
at 02:11 AM

Maybe, but it doesn't mention their D levels.

0a8f18c1bf567443a481a7fd40b3777d

(164)

on May 19, 2010
at 01:41 AM

Those studies are all in vit D deficient populations. The results may not apply generally.

C53665c3f012fa1ede91033b08a8a6e7

(2269)

on May 18, 2010
at 09:51 PM

Take it back if it's really fishy smelling. I stopped taking generic fish oil, though. I take CLO but this post made me question how much I'm taking, now 4gm/day, I think I'll cut that in half.

15d23403fb836f2b506f4f3ad2c03356

(1219)

on May 18, 2010
at 09:41 PM

It's supposed to smell fishy, but not overpoweringly so. Have you kept it in the fridge?

15d23403fb836f2b506f4f3ad2c03356

(1219)

on May 18, 2010
at 04:00 PM

Re Neptune Krill oil, see table 3: http://www.efsa.europa.eu/en/scdocs/doc/938.pdf

15d23403fb836f2b506f4f3ad2c03356

(1219)

on May 18, 2010
at 03:58 PM

All fish oil and krill oil contains some vitamin A, but they do contain much less than cod liver oil. Krill oil often has more than fish oil with an average of 180IU per capsule (a bit higher than often labeled).

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4 Answers

3
15d23403fb836f2b506f4f3ad2c03356

(1219)

on May 18, 2010
at 03:55 PM

Cod liver oil does not have toxic amounts of vitamin A if you take it in the doses recommended. That said, I do think it contains an unhealthy amount of vitamin A, especially for people, like paleo eaters, that consume a lot of pre-formed vitamin A from eggs and dairy and also get sufficient beta carotene from colorful vegetables.

To answer your question, no, other fish oils do not contain nearly as much vitamin A as cod liver oil. Few companies list their vitamin A content and I always look for those. I buy Spectrum fish oil for this reason. It also lists its omega 6 content, which I appreciate too since many fish oil supplements have a lot of omega 6 from farmed fish or even from wild salmon.

Also, the vit A content of fish oil doesn't matter so much if you only take 2 capsuls per day... Recently, I've come to think that one only needs to supplement with about 1 gram of long chain omega 3s per day and that "balance" between 3 and 6 isn't a goal in and of itself. It turns out that cutting linoleic acid (the kind of omega 6 n vegetable oil) intake to under 4% of calories (2% being optimal IMO) is independently important. However, if one doesn't so cut linoleic acid, I don't recommend loading up on fish oil to "balance it out." That's not the way it works (as far as I can tell at this point).

1
9d43f6873107e17ca4d1a5055aa7a2ad

on May 18, 2010
at 11:11 PM

I was kind of disappointed by Robb Wolf's latest show where he quoted Cordain saying that people should be getting most vitamin A from beta-carotene.

Retinol conversion from beta-carotene varies from person to person and some people have very low conversion rates. Women in particular seem to have low conversion rates.

0a8f18c1bf567443a481a7fd40b3777d

(164)

on May 19, 2010
at 01:41 AM

Those studies are all in vit D deficient populations. The results may not apply generally.

15d23403fb836f2b506f4f3ad2c03356

(1219)

on May 19, 2010
at 04:59 PM

What about starchy tubers? They're paleo and are chock full of carotenes.

9d43f6873107e17ca4d1a5055aa7a2ad

on May 19, 2010
at 02:12 AM

It seems ridiculous to think humans should get A from plants given that it's richest in very neolithic vegetables.

9d43f6873107e17ca4d1a5055aa7a2ad

on May 19, 2010
at 11:18 PM

Very few are and they have been bred to enhanced vitamin A content. If you go in the wild and look for something like yams or carrots, you will be really disappointed. But only for awhile because then you like other foragers will realize meat and fish are where it's at nutritionally.

9d43f6873107e17ca4d1a5055aa7a2ad

on May 19, 2010
at 02:11 AM

Maybe, but it doesn't mention their D levels.

0
B4aa2df25a6bf17d22556667ff896170

(851)

on May 18, 2010
at 06:45 PM

i bought a huge thing of naturemaid fish oil from costco a few weeks ago. Ive noticed that it smells fishy and have read that there may be an issue with PCBs. What are your guys suggestions? Throw them away, or finish this container and buy a better brand next time?

15d23403fb836f2b506f4f3ad2c03356

(1219)

on May 18, 2010
at 09:41 PM

It's supposed to smell fishy, but not overpoweringly so. Have you kept it in the fridge?

C53665c3f012fa1ede91033b08a8a6e7

(2269)

on May 18, 2010
at 09:51 PM

Take it back if it's really fishy smelling. I stopped taking generic fish oil, though. I take CLO but this post made me question how much I'm taking, now 4gm/day, I think I'll cut that in half.

0
256225f972a969fec4abe70baedfc3d8

on May 18, 2010
at 03:46 PM

I do think that the dangers of toxic Vit A loads in cod liver oil is exaggerated to say the least; but that is where any potential* problem is at. Regular fish oil do not contain Vit A.

15d23403fb836f2b506f4f3ad2c03356

(1219)

on May 18, 2010
at 04:00 PM

Re Neptune Krill oil, see table 3: http://www.efsa.europa.eu/en/scdocs/doc/938.pdf

15d23403fb836f2b506f4f3ad2c03356

(1219)

on May 18, 2010
at 03:58 PM

All fish oil and krill oil contains some vitamin A, but they do contain much less than cod liver oil. Krill oil often has more than fish oil with an average of 180IU per capsule (a bit higher than often labeled).

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