Ok but WHY does fish oil cause burping?

Answered on June 03, 2014
Created May 30, 2014 at 8:40 PM

I've been taking fish oil for years now. First it was a failed attempt at reducing triglycerides (before I knew about Paleo or high fat or any of that good jazz so I was still eating lots of carbs), then I took small amounts of the flavored Nordic Naturals because they didn't cause burps and I thought they were fresher than the pharmacy stuff (prescription stuff is superpowerful, but it's often also old and nasty if you break it open). Now I have a pretty good tolerance for not burping after taking it, so today I made one of these as a snack while I waited for the eventual Friday night dinner out....

tomato juice (heated)

protein powder


fish oil

sprinkle of salt, spices

It's my version of instant soup, now that I eat "real food" though I admit the protein powder doesn't qualify. Then again, neither does highly processed fish oil... but I digress...

For the first time in a long time, I got the burps from that. I'm wondering if it was the heat (I cooled by adding some cold TJ before adding the fish oil by the way, I'm not foolish), or maybe I already had air in my stomach and the oil lubed it up and it was able to come out. There was no pain or cramping involved and the effect was instant, I wasn't even done drinking it when it started. Does stomach acid release gas when it contacts with fish oil? Luckily it was the good stuff, so it didn't stink much, but it was still odd.

I saw this:


I'm not looking for tips so much as an explanation. What happened?


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on June 03, 2014
at 05:21 PM

Bueller? :)

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