Fish Oil Burps and Fishy Aftertaste: What Can You Do About Them?
You take your fish oil with breakfast, get on with your morning, and then half an hour later there it is: that unmistakable fishy taste again.
If fish oil burps are the problem, start with three simple checks: the meal, the capsule and the bottle. Taking fish oil with food may help some people, an odourless or flavoured capsule may make the aftertaste less noticeable, and correct storage matters for keeping the oil in good condition. None of these steps can guarantee no burping, but they can make fish oil easier to live with.
The first thing to notice is whether you are dealing with an ordinary fishy aftertaste or burp, or something more persistent such as burning reflux, ongoing nausea or wider digestive upset. That difference matters because changing the way you take fish oil may help with a simple aftertaste, while repeated or worsening symptoms deserve proper health advice.
First, is it fishy aftertaste or something more than that?
A fishy burp is usually exactly what it sounds like: you swallow a fish oil capsule, then taste or smell fish again later when you burp. An unpleasant taste is also a recognised mild side effect of omega-3 supplements.
Reflux can feel different. It may include a burning feeling in the chest or upper stomach, or an acidic taste as stomach contents come back up. Fish oil can be associated with heartburn, nausea and other digestive symptoms in some people, so persistent discomfort should not simply be written off as a normal fish-oil aftertaste.
If it is mainly the fishy repeat that bothers you, there are a few practical things worth checking before you give up on fish oil altogether.
Start with the meal
Before changing anything, read the directions on your own bottle. Different products have different instructions, so the label should come first rather than a universal rule about timing or dose.
Healthify NZ currently advises taking omega-3 or fish oil supplements with or just after food, noting that this may reduce reflux and burping. That is a useful place to start if you have been taking your capsule on an empty stomach.
Our GO Fish Oil 1500mg Odourless is one example where the directions say it is best taken with food. We would stick with the label instructions rather than shifting the dose around on your own.
If your current fish oil already says to take it with food and you still notice a fishy aftertaste, the next thing to look at is the capsule itself.
Then look at the capsule
Some fish oils are made with taste and odour in mind. You may see words such as odourless, or find natural flavours such as vanilla or lemon in the capsule. These features do not work the same way for everyone, and they do not treat reflux, but they can be worth considering when the taste is what makes you dread taking fish oil.
GO Fish Oil 1500mg Odourless contains 1500mg of natural fish oil per capsule, providing 450mg of omega-3 marine triglycerides, including 270mg EPA and 180mg DHA. The softgel is vanilla flavoured, and vitamin E is included as an antioxidant. We like that the formula keeps the EPA and DHA amounts clear while also offering an odourless presentation for people who are sensitive to fishy aftertaste.
Another option we stock is Nature's Sunshine Super Omega 3 EPA. Each capsule contains 1000mg of fish oil with 380mg EPA and 190mg DHA, plus natural lemon oil. The lemon oil is included to improve taste and reduce the usual fish-oil aftertaste. Its directions say to take it with a meal and refrigerate after opening.
The point is not that vanilla or lemon guarantees a perfect experience. It is that if taste is the one thing stopping you from taking a fish oil you otherwise want to use, a product designed to make the fishy side less noticeable may be worth trying.
Do not forget the bottle
The capsule gets most of the attention, but the bottle matters too. Check the best-before date, make sure the seal was intact when you opened it, and look for damaged, sticky or leaking softgels.
Then follow the storage instructions on that exact product. Some fish oils can be kept according to the general label directions, while others have more specific instructions. Nature's Sunshine Super Omega 3 EPA, for example, says to refrigerate after opening.
Healthify NZ notes that fish oil can go off and should not be used beyond its expiry date or if it smells strongly rancid. A fishy burp on its own does not prove the oil has gone bad. The date, smell, condition of the capsules and storage history give you a much better picture.
We do not recommend freezing fish oil as a blanket fix for burping. Storage instructions vary, so follow the current label instead.
What we stock when taste is the reason you want to change fish oil
One unpleasant bottle does not mean every fish oil will feel the same to take. In our fish oil range, we can help you look beyond the total fish oil number and check the details that may matter when aftertaste is the problem.
For us, that means looking at a few practical features together. Is the product described as odourless? Does it include a flavour such as vanilla or lemon? Does the label say to take it with food or with a meal? Are there special storage directions after opening? And what EPA and DHA amounts are actually provided in each capsule?
That is why GO Fish Oil 1500mg Odourless is a useful option to know about. You get 270mg EPA and 180mg DHA per capsule, with a vanilla-flavoured, odourless presentation and directions to take it with food. If fishy aftertaste is the specific reason your current fish oil is unpleasant, those details may make it a better fit for day-to-day use.
Nature's Sunshine Super Omega 3 EPA takes a different approach, with natural lemon oil, 380mg EPA and 190mg DHA per capsule, directions to take it with a meal, and refrigeration after opening. We do not rank one format over the other. The useful choice is the one whose label, flavour and storage instructions fit how you actually take fish oil.
When changing fish oil is not the answer
If you keep getting burning reflux, significant nausea or other digestive symptoms, especially if they are worsening, it is better to ask a pharmacist, GP or another qualified health professional rather than keep switching products and hoping the problem settles.
Also get advice if you think you may be having a reaction, if you have a fish or shellfish allergy, if you take regular medicines including blood-thinning medicines, or if you have an operation or procedure coming up. Pregnancy, breastfeeding and giving fish oil to a child are also good reasons to check what is appropriate for your situation.
We can help with general product details, label directions and what we currently stock. If you want help narrowing down the fish-oil options before you speak with your health professional, you can contact our Healthy team.
Common questions
Why does fish oil make me burp?
Fish oil can leave an unpleasant taste or come back up as a fishy burp after you take it. Healthify NZ notes that aftertaste, burping and reflux can happen with fish oil supplements, and the experience can vary between products.
How can I reduce fishy burps from fish oil?
Start by checking your own label. Taking fish oil with or just after food may help reduce burping or reflux, and choosing a product designed around odour or flavour may also make the experience easier for some people. Check the bottle is in date and stored exactly as directed.
Should I take fish oil with food?
Follow the directions on your own product first. Healthify NZ says taking fish oil with or just after food may reduce reflux and burping, and some products we stock specifically direct you to take them with food or with a meal.
Do fishy burps mean the fish oil has gone bad?
No. Fishy burping by itself does not prove that the oil is rancid. Check the best-before date, seal, capsule condition and storage directions, and do not use fish oil past its expiry date or if it smells strongly rancid.
Does odourless fish oil stop burps?
Not necessarily. An odourless presentation is designed to make fish smell or aftertaste less noticeable, but it cannot guarantee that you will never burp or experience reflux. It may simply be a more comfortable option if taste is your main problem.
Does lemon-flavoured fish oil help with aftertaste?
It may make fish oil more pleasant to take. For example, Nature's Sunshine Super Omega 3 EPA contains natural lemon oil to improve taste and reduce the usual fish-oil aftertaste, but individual experiences can still differ.
Is fishy aftertaste the same as acid reflux?
Not always. A simple fishy taste or burp can happen without heartburn. Acid reflux more often involves stomach contents or acid coming back up, and may cause a burning feeling or an acidic taste. Persistent or worsening symptoms are worth discussing with a health professional.
When should I stop taking fish oil and ask for advice?
Ask a pharmacist, GP or another qualified health professional for advice if you have persistent or worsening reflux, significant nausea or digestive symptoms, a suspected reaction, fish or shellfish allergy concerns, or questions about fish oil during pregnancy, breastfeeding or for a child. Also get advice if you take regular medicines, especially blood-thinning medicines, or have an upcoming operation or procedure.
Make the fishy repeat less of a reason to quit
If you want to keep using fish oil but the aftertaste is putting you off, come back to the same three checks: the meal, the capsule and the bottle. Follow the label around food, look for an odourless or flavoured option if taste is the main barrier, and make sure the oil is in date and stored as directed.
A different format will not guarantee no burps or reflux, but it may make fish oil more comfortable to take. If you are ready to look at alternatives, explore our current fish oil options and compare the features that matter most to you.