Best fish oil supplements for topping up your omega-3 levels

The best fish oil supplements can help improve your health by supporting your heart and mental health, as well as easing inflammation

the best fish oil supplements on a table
(Image credit: Getty images)

The best fish oil supplements are in high demand these days. It’s no secret that including omega-3 in your diet has many benefits for your health. But it’s not always easy to get the recommended amount of omega-3 in your diet, especially if you aren’t a fan of oily fish. This is where taking one of the best omega-3 supplements can form a health-boosting daily habit and it’s an affordable one.

If you’re searching for the right fish oil supplement for you then you’re probably already aware of the various fish oil benefits that come from consuming omega-3. For example, one study published in the Journal of Nutritional Biochemistry (opens in new tab) found that omega-3 fatty acids may lower the risk of cardiovascular disease and inflammation in the body. Research (opens in new tab) has also found it can benefit individuals' mental health such as reducing symptoms of anxiety. But with this knowledge, you’ll want to ensure you find the right fish oil supplement that suits your needs and is packed with top-quality nutrients for getting your daily dose of omega-3.

The two types of beneficial omega-3 fatty acids are known as eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) so the first port of call before buying any fish oil supplement is to ensure they contain these two ingredients. Each inclusion in our guide below covers this and states the volume of these ingredients present in the supplement. Some of the best fish oil supplements also come in liquid forms, like the Barlean’s Omega Pals product that features below. This is citrus flavored and suited for adding to children’s drinks but any adults who struggle to swallow capsules will like this option too.

Keep reading to find out more about the size of capsules, the packaging used and the sustainability of each product listed in our guide, and narrow down the best fish oil supplement for you.

What strength should your best fish oil supplements be?

There are three forms of omega-3; APA, commonly found in plants, DHA, and EPA. Generally, EPA and DHA are sourced from oily fish, and the balance between EPA and DHA varies across the best fish oil supplements. 

So, what strength omega-3 supplement should you choose? According to Dr Alex Richardson (opens in new tab), senior research fellow at Oxford University and the founder of Food and Behaviour Research: 

  • For general and heart health: 500mg combined total
  • For anti-inflammatory benefits: 1000-2000mg combined total
  • For depression and mental health: 1000-2000mg of EPA
  • For pregnancy and breastfeeding: High DPA content and labelled safe for pregnancy

Before you go to increase your Omega-3 levels, it's crucial to check with your doctor or healthcare provider in advance of taking any supplements. This is particularly important if you suffer from any health conditions or are on any medication.

The best fish oil supplements you can buy right now

nordic naturals ultimate omegas

(Image credit: Amazon)

1. Nordic Naturals Ultimate Omega

The best fish oil supplement for most people


Combined EPA/DHA: 1100mg
EPA : 650mg
DHA: 450mg
Form: Soft gel capsules

Reasons to buy

Good dose and ratio of EPA/ DHA 
Certified for sustainability by Friends of the Sea 

Reasons to avoid

Plastic packaging 
Big capsules, may be hard to swallow 

Nordic Naturals specializes in high quality, safe and ethically sourced fish oils. The company is based in the US, but it was set up by a Norwegian, Joar Opheim, whose mission was to improve the quality of omega-3 supplements available on the American market. There are many good reasons why one of their flagship products, Ultimate Omega softgel capsules, landed on the top of our podium. 

With a combined EPA and DHA of 1100mg they provide a high quality, high purity option for a fairly affordable price. Ultimate Omega fish oils are free from artificial additives and promise a pleasant lemon flavor with no fishy aftertaste. What’s more, Nordic Naturals states it uses only wild-caught sardines and anchovies and their fishing methods are certified by Friends of the Sea for sustainability.

What the users say:

User reviews of Nordic Naturals Ultimate Omega are extremely positive, with the product scoring an impressive 4.8 out of five stars on Amazon. Positive reviews cite that, compared to cheaper fish oils, the product doesn’t upset their stomach, and they appreciate the high quality of the production methods. Negative reviews, whilst few and far between, tend to focus on the capsules’ unpleasant smell, which is surprising given the company promises a lemon flavor. 

The size of the capsules may not be to everyone’s liking, but that’s not necessarily a problem - this supplement is also available in liquid form that boasts a combined EPA and DHA of 2470mg. If you’re looking for a quality fish oil supplement, and don’t mind paying a little bit more, this is a great option. 

nature made omega 3 minis

(Image credit: Amazon)

2. Nature Made Omega-3 From Fish Oil Minis

The best budget fish oil supplement


Combined EPA/DHA: 930mg
EPA: 680mg
DHA: 250mg
Form: Soft gel capsules

Reasons to buy

Free from PCBs, dioxins, mercury, furans and other harmful compounds 
Small, easy-swallow soft gel capsules 

Reasons to avoid

Plastic packaging
No sustainability certification 

Nature Made is a great option for anyone struggling to afford the price tag of the more premium fish oils, or who may be taking several different supplements. One of the most popular supplement companies in the US, it manages to offer a combined EPA/DHA of 930mg for a fraction of the cost of many other high-quality oils.

Nature Made claims to use wild ocean fish rather than resort to industrial farming practices, but no sustainability certificates could be found on their website. Their fish oils undergo a purification process to remove harmful compounds (such as PCBs, dioxins, mercury and furans) and ensure that there’s no fishy odor or aftertaste. Fish oil minis are also free of artificial colourings, allergens and additives. The soft gel capsules are only one inch long, making them a perfect choice for people who have issues with swallowing regular-sized supplements, or who don’t want the unpleasant fishy taste that can come with larger tablets.

What the users say:

The product scores an impressive 4.1 out of five stars on Amazon. Most users like the fact that the small capsule doesn’t cause any ‘fishy burps’ or unpleasant aftertaste. However, many feel that the name ‘mini’ is misleading, with the capsule only being a fraction smaller than some other pills. 

The affordable price tag means the dose can be doubled or even trebled if needed. All in all, Nature Made Omega-3++ From Fish Oil Minis is a welcome low cost option. 

hum nutrition omega the great supplement

(Image credit: Alice Ball)

3. HUM Nutrition OMG! Omega the Great Supplement

The best premium fish oil supplement


Combined EPA/DHA: 1200mg
EPA: 800mg
DHA: 400mg
Form: Soft gel capsules

Reasons to buy

High EPA and DHA content 
Certified for sustainable fishing 

Reasons to avoid

Plastic packaging
Expensive over time

HUM Nutrition prides itself on providing premium supplements that routinely undergo strict clinical testing procedures before being released onto the market. Its OMG! Omega The Great product is no exception. Boasting a significant dose of 1200mg combined EPA/ DHA, it’s one of the richest sources of high quality omega-3 fatty acids in the US. This supplement is enriched with vitamin E, which supports healthy and glowing skin, and comes with no artificial additives, GMOs or gluten. 

The capsules themselves are surprisingly large — and have a harder texture than you'd expect for 'softgels'. This being said, we found them easy to swallow and they had a very faint lemon taste that was not unpleasant. 

What the users say:

According to user reviews, the OMG! Omega the Great does not have a fishy aftertaste and produces great short and long-term results. It scores 4.5 out of five stars on Amazon, with many users citing a boost in their mood and skin appearance. The downside is obviously the price, with some users having to switch to a more affordable product. 

All HUM Nutrition products are made in facilities that are certified to follow Good Manufacturing Processes. In addition, their fish oils are extracted from sustainably sourced anchovies. The only two downsides to the OMG! Omega the Great supplement is its hefty price tag - almost $30 per bottle, which only lasts you 30 days - and plastic packaging.  

Vegetology omega-3 DHA and EPA capsules

(Image credit: Alice Ball)

4. Vegetology Opti 3 Omega 3 EPA & DHA

The best fish oil supplement alternative for vegans


Combined EPA/DHA: 800mg
EPA: 300mg
DHA: 500mg
Form: Capsules

Reasons to buy

Great vegan source of EPA & DHA 
Can be used in pregnancy

Reasons to avoid

More expensive than some fish oils
Quite large capsules to swallow

Unlike many vegan omega-3 supplements, Opti 3 contains a very good level of EPA and DHA fatty acids. In fact, these supplements offer a higher level of EPA/DHA than most of the average fish oils you will find on the high street. They also contain a small, plant-based dose of vitamin D3 - another nutrient which is tricky for vegans to get through their diet. However, bear in mind that the serving size is two capsules, not one, so the 60 capsule supply will actually only last you 30 days.

What the users say:

User reviews generally think this is a value-for-money vegan omega-3 supplement, as many algae-based omegas can be quite expensive. They also like the higher levels of DHA and EPA compared to other brands. Negative reviews are hard to find, but the few ones cite a slightly sea-like taste. 

Sourced from algae instead of fish, these capsules are certified by the Vegan Society and Vegetarian Society and are safe for use in pregnancy. You can pierce the capsule and pour the liquid onto a spoon (or into food or drink) but it’s a bit fiddly. However, they're really easy to swallow, despite being quite long, and completely tasteless. A firm Fit&Well favorite.

Barleans omega pals

(Image credit: Alice Ball)

5. Barlean's Omega Pals

The best fish oil supplement for children


Combined EPA/DHA: 750mg
EPA: 455mg
DHA: 295mg
Form: Liquid

Reasons to buy

Four flavor options
High in EPA and DHA to support brain function

Reasons to avoid

Capsules might work better for older children
Plastic packaging

Omega-3 is a critical nutrient for children’s developing brains, with studies (opens in new tab) finding that omega-3 supplementation can reduce behavioral problems. Further research (opens in new tab) also suggests omega-3 intake can support neurological conditions such as ADHD, dyslexia, dyspraxia and autism. 

Children can find big capsules hard to swallow. They may also be extremely fussy about liquids. But don’t worry. Barlean’s Omega Pals are perfect for picky eaters, squeezing a dose of 750mg of EPA and DHA into a single serving of 1.5 teaspoons. With a creamy, smoothie-like texture and a choice of four sweet flavors (lemonade, tangerine, straw-nana and citrus), it can easily convince even the most demanding taste buds. These fish oils can be eaten on their own, or easily mixed into yogurts, desserts and other meals. We love the straw-nana flavor best – it has absolutely no fishy aftertaste, and even for adults it makes a nice change if you take quite a few supplements. 

What the users say:

User reviews for Barlean’s Omega Pals are very positive, with the product scoring 4.9 out of five stars on iherb. Many parents note improvements in their child’s behavior since taking the product, and all are very complimentary of the taste. They say the bottle is easy to store in the fridge too. 

Suitable even for one year old toddlers, Barlean’s fish oils do not contain any artificial additives, heavy metals, GMOs or allergens. The company follows strict NSF Good Manufacturing principles and every product they make is rigorously tested by third parties. Moreover, the single bottle contains nearly eight ounces of fish oils, making it a highly affordable choice. The downside? It comes in quite flimsy, plastic packaging that isn’t recyclable. 

How to choose the best fish oil supplements

While many of the best omega-3 supplements list the amounts of EPA and DHA, some manufacturers make claims that their products are 'ultra-strength' or offer superior forms of omega-3. 

As Dr. Richardson notes, these marketing-led options often "include short-chain ALA omega-3s which our bodies can't convert well." Instead, she advises that you should be looking "for the EPA and DHA content [to] be at least 500mg."

Dr. Richardson also advises that you likely don't need supplements containing omega-6, as "most of our diets are already flooded with omega-6 when compared to omega-3."

She notes that this "imbalance increases the risks for a wide range of physical and mental health disorders, including heart disease, stroke and 'brain disorders' such as anxiety and depression."

As a result, it's crucial to keep your levels of omega-3 topped up with the best fish oil supplements. You don’t need to avoid omega-6 completely, but try to get it from healthy omega-6 foods and steer away from processed foods. 

Asides from strength, you’ll want to consider the form of the fish oil supplement. Not everyone likes swallowing tablets, in which case you might prefer a liquid supplement or opt for a brand that offers miniature tablets or easy swallow pills. It’s worth noting the recommended dose too, because whilst you may think that a supply will last a certain period of time, sometimes you need to take up to four capsules for one dose.

If you don’t eat fish, you will also want to opt for a vegan omega-3 supplement made from algae. But bear in mind that these can sometimes be more expensive. If you do consume fish, it’s worth noting what the product has been made from. The products in our guide are sourced from wild and sustainability-sourced fish, but this isn’t consistent across all of the fish oil supplements on the market.


What is fish oil good for?

There are many benefits you can get from fish oil, including protecting your heart, promoting good mental health, and supporting women through pregnancy. These health benefits are a result of the omega-3 content in fish oil.

We don't naturally produce this fatty acid, so it is essential that it comes from our diet. Research has found that insufficient levels of EPA and DHA, two forms of omega-3, can be as harmful as smoking when it comes to life expectancy for over-60s. 

If you can't add oily fish (such as salmon, mackerel, anchovies, sardines or herring) into your diet, you need to look elsewhere for your recommended intake of omega-3. Whilst plant-based sources of omega-3 do exist, they tend to be higher in ALA omega-3. The body struggles to convert this to the DHA and EPA we need for brain and heart health. That's where the best fish oil supplements come in. 

These products either come as capsules, tablets, or in oil form, so you have several ways to incorporate fish oil into your diet without having to sit down to a meal of oily fish twice a week. 

Are fish oil and omega-3 the same?

Fish oil is a supplement derived from oily fish like salmon, sardines, and anchovies, and it contains omega-3, a fatty acid that plays several crucial functions in our bodies. We don't naturally produce omega-3, so we have to get it from our diet.

Typically, this means eating oily fish a few times per week, but that's not always possible. So, fish oil supplements are ideal for topping up your levels of omega-3. Interestingly, the fish used don't make omega-3 either, but get it through their food. This is why you can also buy vegan omega-3 supplements, because they are made from the algae that the fish eat.

There are three forms of omega-3; ALA, EPA, and DHA. While ALA is commonly found in plants, DHA and EPA come primarily from fish. So, to get your allowance, you either need to eat oily fish or take fish oil supplements regularly.

Should you take fish oil every day?

There is no hard and fast answer to this question. Why? Because essentially, the answer will differ from person to person depending on how much fish oil you already eat each week. 

Grace Derocha RDN, CDCES, MBA, registered dietitian and national spokesperson for the Academy of Nutrition and Dietetics (opens in new tab) says: “In general, it is called a fish oil supplement because it is a supplement to what we eat daily. Ideally, we would get fish oil from the fatty fish we eat.”

The American Heart Association (opens in new tab) recommends eating two servings of fatty fish per week. Examples of fatty fish include salmon, tuna, sardines, trout or mackerel. 

However, this will prove difficult if you are a vegetarian, follow a vegan diet, or don’t like eating this type of fish. But that’s where the best fish oil supplements can step up to the plate.

Derocha says: “Fish oil comes from many types of fish. Usually rich in two crucial Omega-3 fatty acids called eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA). Fish oil supplements have most often been used by adults in doses of up to 6 grams daily by mouth for up to 12 weeks. Fish oil products typically provide 180-465 mg of EPA and 120-375 mg of DHA per capsule.”

The reference daily intake (opens in new tab) (RDI) for EPA and DHA is 250-500mg per day. 

However, before taking a fish oil supplement, consider discussing this with your health care professional, and always ensure you read the instructions on the label. 

How we test

Each of the products included in this guide was tested by the Fit&Well team. Supplements will affect each and every person slightly differently so we’ve been using these vitamins to give you a better idea of what they contain, and anything you need to be aware of before taking them. Below are the criteria we tested each product for. 


It’s super important to us that you know exactly what we tested and why and our first starting point is always to find out exactly what ingredients are in a fish oil supplement. We then compare this against your daily recommended dosage and decipher whether you can get enough omega-3 DHA and EPA from these supplements. 

Recommended dosage

We made sure to note how much of each supplement you are required to take and how much often. This gave us a clear indication of whether a product offered good value for money or not.


Not all vitamins and supplements will be suitable for everyone which is why we take note of whether a fish oil supplement is suitable for vegans (i.e. contains algae-derived omegas) or those on a gluten-free diet.

Cost and value for money 

Getting the nutrients you need shouldn’t have to cost any more than necessary so we compared pricing across all the fish oil supplements we tested to see whether the more expensive capsules were worth the money and if the cheaper supplements still contain everything you need.  

Easiness to swallow & taste

For some, taking capsules or tablets can be very challenging so we test each and every fish oil supplement by taking them ourselves and observing how easy they are to swallow. 

The taste, while subjective, is another important factor we test. We try each capsule and note down whether they taste like the intended flavor or anything else you may need to know about after tastes too.


When we test fish oil supplements, we note anything that makes one supplement stand out over the others. We ask if any of the supplements claim to do something that others don’t, and we also consider the overall aesthetics of the product.

Claire is a freelance health, fitness and food journalist who has written for titles including Women’s Health, Top Santé, Woman & Home, Feel Good You, the Telegraph and Independent. She has a passion for being outside in nature and you’re more likely to find her walking in the woods or joining an exercise class in the park than pounding a treadmill in the gym. She also has a special interest in nutrition and healthy eating, having previously been Food Editor at Top Santé magazine. Her top fitness tip? Take your exercise outdoors wherever possible. It has been shown to boost the physical as well as mental health benefits of a workout and also to make you more likely to want to do it again!   

With contributions from