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photo by shalommama on flickr. license: attribution


Some recent information has come to my attention regarding Green Pasture’s Blue Ice fermented cod liver oil. Continue reading for full details on why I will no longer be recommending this product.


As many of you probably know, I was a big fan of fermented cod liver oil. It all started around 4 years ago when I read Cure Tooth Decay, in which FCLO is heavily recommended to help heal dental cavities. I was also required to read The Nourishing Traditions Book of Baby & Child Care for my natural nutrition course, which also heavily endorses fermented cod liver oil as being the best, most high-quality cod liver oil supplement on the market. Some of the reasons it was/is touted as being ‘the best’ include vitamin K2 content, probiotics (due to the fermentation), more bio-available nutrients, and its processing technique which claims to preserve the nutrients in cod liver oil better than other techniques. This supplement is quite a bit more pricey than your average cod liver oil, but all its special properties are supposed to make it worth the price. I have personally taken this oil on a semi-regular basis over the last few years to help strengthen my teeth, clear my skin, heal my gut, and manage my seasonal allergies. Whether placebo effect or not, I do believe it helped.


But now for the bad news; it turns out that FCLO may not live up to its claimsDr. Kaayla Daniel wrote a 110 page report on her research and findings after purchasing several bottles of Green Pasture’s fermented cod liver oil (unflavored) and sending them to laboratories to be tested. These bottles were tested for vitamin content, omega-3 content, rancidity, and many other factors to get a clearer picture of what exactly a bottle of FCLO contains. You can read the full report here.


The summary of her findings include serious allegations against Green Pasture’s including:

  • FCLO is diluted with vegetable oil
  • FCLO contains significant amounts of transfat
  • FCLO is rancid (several different tests were done to confirm)
  • FCLO contains lower amounts of vitamin A and D than stated


Green Pasture’s has released a response to Dr. Kaayla Daniel’s research stating that her allegations are unfounded and that their products remain high quality and healthful. They also released a follow-up report written by 2 food scientists that also supports FCLO as a high quality fish oil. So, who should we believe? My honest answer is that I have no idea. However, this is not the first time I have heard negative feedback on FCLO, so it makes me a bit skeptical. If you would like to learn more about the FCLO controversy, The Paleo Mom wrote an excellent summary article where she compares some of the results and interprets them.


Due to these recent events, I will no longer be promoting or recommending fermented cod liver oil or any product from Green Pastures on this blog as I cannot be 100% certain their products are worth the price, or are as high quality as claimed. Over the next few weeks I will be combing this website for affiliate links and recommendations of FCLO. If you see an article on this website that recommends FCLO, please don’t hesitate to email me or comment on the article and I will remove it as soon as possible.


In the mean time, I am still a huge supporter of cod liver oil, just not the fermented variety. If you are looking for an alternative to FCLO, I recommend Rosita extra-virgin cod liver oil.



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Categories: Nutrition Supplements


One thought on “Breaking up with Fermented Cod Liver Oil”

  1. I don’t believe these things they are accusing Green Pastures of! I will still be taking my fermented cod liver oil, I feel great when I take it.

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