A premium omega-3 supplement should feel like a considered addition to your wellbeing routine, not something you regret tasting an hour later. Knowing how to take omega-3 (and avoid fishy burps) comes down to a few practical details: the formulation you choose, when you take it and how you store it. If you are still choosing a product, our guide to choosing an omega-3 supplement covers that side.
Fishy aftertaste is common with some fish oil supplements, but it is not something you simply have to tolerate. A high quality product and a little attention to your routine can make taking omega-3 considerably more comfortable.
Why omega-3 supplements can cause fishy burps
Most fishy burps happen when an oil capsule lingers in the stomach or rises back into the oesophagus after swallowing. As the capsule begins to break down, its natural marine aroma can become more noticeable. This is more likely if you take a supplement on an empty stomach, swallow it with only a small amount of water or lie down shortly afterwards.
The quality, freshness and form of the oil matter, too. Omega-3 oils are naturally delicate and can oxidise when exposed to heat, light and air. An oil that has degraded may have a stronger smell or unpleasant taste. This does not mean every capsule with a mild marine scent is unsuitable, but a distinctly rancid odour or taste is a reason not to continue using it.
Some people are simply more prone to reflux or indigestion. In that case, even an excellent-quality fish oil may be better tolerated with changes to timing, dose or formulation.
How to take omega-3 for better comfort
Take it with a proper meal
For most people, the simplest answer is to take omega-3 during or immediately after a substantial meal, rather than before breakfast with a coffee or between meals. Food in the stomach can reduce the likelihood of reflux and may help the capsule pass through the digestive system more comfortably making fishy aftertaste less likely.
A meal containing some fat is particularly sensible. Omega-3 fatty acids are fat-soluble, so taking Omega 3 with a foods such as eggs, yoghurt, olive oil, avocado, nuts or oily fish may also support absorption of EPA and DHA. You do not need an unusually rich meal - simply incorporate your supplement into a meal you already eat consistently.
If lunch is your largest meal, take it then. If you prefer supper, that is equally reasonable, provided you do not take it immediately before lying down. The best timing is usually the one you can maintain comfortably.
Swallow capsules with a full glass of water
Take capsules upright with a generous glass of water. This helps them pass through the oesophagus and into the stomach, rather than catching or dissolving too early. Avoid lying down immediately afterwards, particularly if you experience reflux.
For liquid omega-3, measure the recommended serving carefully and take it with food. A flavoured liquid can be a pleasant option for those who dislike swallowing capsules, although taste preferences vary considerably.
Split a larger daily serving
If your chosen supplement provides more than one capsule or a higher daily amount, splitting it between two meals may help. One capsule with breakfast and one with your evening meal is often easier on the stomach than taking both together.
This approach can also be useful for anyone who experiences mild digestive discomfort from oils in general. Do follow the pack directions, and do not exceed the recommended daily amount unless a healthcare professional has advised you to do so.
Choose the right type of omega-3
Not all omega-3 supplements are the same. Compare products using the amount of EPA and DHA per daily serving, rather than the total amount of fish oil, as these values can differ considerably between products.
Compare products using the amount of EPA and DHA per daily serving, rather than the total amount of fish oil, as these values can differ considerably between products. EPA and DHA are the long-chain omega-3 fatty acids most commonly sought from marine oils, while plant-based supplements often provide ALA which can be converted into EPA and DHA, but conversion is generally limited, particularly for DHA - our explainer on EPA, DHA and ALA sets out the difference.
For a refined daily option, consider the format as closely as the dose.
Fish oil capsules and softgels
Fish oil remains a popular choice, particularly in concentrated formulations that provide meaningful amounts of EPA and DHA in fewer capsules. Look for products designed with freshness and purity in mind, and store them according to the label. Smaller softgels can be easier to swallow, while larger capsules may suit those who prefer a higher-strength serving.
Enteric-coated capsules are designed to pass through the stomach before dissolving. They can reduce fishy burbs for some people, although they are not a guaranteed solution and may not suit everyone. If you have a sensitive stomach, they are worth discussing with a pharmacist.
Krill oil
Krill oil is another marine-derived option, typically supplied in smaller capsules. Its omega-3 fatty acids are naturally bound to phospholipids, and some people find it more agreeable than standard fish oil. However, EPA and DHA amounts can be lower per capsule, so compare the actual omega-3 content before choosing on capsule size alone - our fish oil versus krill oil comparison goes further.
Algal oil
Algal oil is an excellent vegan and vegetarian source of DHA, with some formulations also providing EPA. As it is derived from algae rather than fish, it is often the most appropriate choice for those avoiding fish or shellfish. It may also appeal to anyone who finds the flavour or aroma of fish oil off-putting.
The ideal option depends on your dietary preferences, required EPA and DHA amount, budget and tolerance. A pharmacist can help you compare labels if you are unsure which format is most suitable.
Storage makes more difference than many people realise
Omega-3 oils are sensitive to a warm windowsill, a steamy bathroom cabinet or the glove compartment of a car. Keep capsules tightly closed in a cool, dry place away from direct sunlight, following any specific storage instructions on the packaging. Some liquid formulations require refrigeration after opening.
If a manufacturer states refrigeration is appropriate, keeping capsules chilled may reduce fishy aftertaste for some people, although evidence is limited. Do not freeze a product unless its label says this is appropriate. Freezing may alter a capsule's texture, and it is not a substitute for choosing a fresh, well-made supplement.
Check the best-before date before purchase and use the product within the stated period after opening. Do not consume supplements beyond their expiry date or if the capsules are leaking or damaged. With liquid oils especially, avoid using a bottle that smells sharply stale, sour or rancid.
Common habits that make fishy burps more likely
Taking omega-3 first thing on an empty stomach is a frequent culprit. So is swallowing several supplements at once with minimal water, particularly if you then rush out of the door. A large dose taken just before bed can be another trigger for people prone to reflux.
It can help to separate omega-3 from other supplements if your stomach feels overloaded. There is no universal rule here - many people take several vitamins together without difficulty - but reducing the number of capsules at one sitting can make it easier to identify what is causing discomfort.
Avoid pairing your supplement with a meal that already causes indigestion, such as a very rich late-night dinner, if reflux is an issue. The goal is not to make your routine restrictive, but to choose the most comfortable and consistent pattern.
When to seek tailored advice
Omega-3 supplements are not appropriate in precisely the same way for everyone. Omega-3 supplements can interact with some medicines. Always read the product information and seek professional advice if you are unsure. If you take anticoagulants (such as warfarin or apixaban) or antiplatelet medicines (such as clopidogrel), speak to a pharmacist or your prescriber before starting a high-dose omega-3 supplement. Standard over-the-counter doses are not generally associated with clinically significant bleeding in most people, but individual assessment is appropriate.
Speak to a pharmacist, GP or other qualified healthcare professional if you, are due to have surgery or an invasive procedure, If you have a fish allergy or shellfish allergy (Algal oil may be a suitable alternative for some people), or are pregnant or breastfeeding. Advice is also worthwhile if you are considering a high-dose product for a specific health concern.
Persistent burping, heartburn, nausea or upper abdominal pain should not automatically be attributed to a supplement. Stop taking the product and seek professional advice if symptoms are severe, ongoing or concerning.
Our omegas and oils range covers the formats discussed here. A well-chosen omega-3 should fit quietly into your day: taken with a meal, stored with care and selected to suit your preferences and health needs.
