When it comes to healthy fats, perhaps none are better known—or better understood—than omega-3s.
You might associate omega-3s with a big chunk of salmon or another fatty fish (they are, after all, the reason that dieticians recommend eating fish at least twice per week as a baseline starting point).
Though omega-3s are often touted for supporting heart health, the reality is your brain, eyes, joints, and so much more depend on an ample supply of these important fats.
They cannot be produced by the human body, which means that they must be obtained through diet or supplementation. This means if you have a hard time incorporating lots of oily fish into your diet, omega-3 supplements should definitely be on your radar.
The most convenient way to increase your Omega-3 levels is a good quality fish oil supplement. But not all supplements are created equally so you'll need to choose carefully.
In this guide we take a closer look at the science behind Omega-3, as well as some important considerations when it comes to shopping for a high quality fish oil supplement.
What Are Omega-3s?
Omega-3s, also known as omega-3 fatty acids, are essential polyunsaturated fats that play a crucial role in maintaining good health.
There are three main types: eicosapentaenoic acid (EPA), docosahexaenoic acid (DHA), and alpha-linolenic acid (ALA) which all offer a variety of benefits for your health.
Omega-3s are known for supporting heart health, promoting healthy brain function, and reducing inflammation throughout the body.
Regular consumption of omega-3s has also been linked to lower blood pressure, reduced levels of triglycerides, and a decreased risk of developing cardiovascular diseases.
Omega 3 Benefits:
Heart
Brain
Vision
Mood
Hormone Balance
Joints
Omega 3 Supplements: 2025 Buyers Guide
When it comes to choosing an omega-3 fish oil supplement, not all products are created equal.
The quality of the supplement can vary depending on a number of factors, including the source of the fish oil, the processing methods used, and the concentration of omega-3 fatty acids in the supplement.
By taking the time to research and compare different omega-3 supplements, you can ensure that you are getting a high-quality product that will provide maximum health benefits.
Let's take a closer look at some of the important things to consider when comes to shopping for a high quality omega-3 supplement...
3 Things To Look For:
1
Omega-3 Source
One key factor to consider when choosing an omega-3 supplement is the source of the fish oil.
Some supplements are made from fish that are low in omega-3s or are raised in polluted waters, which can result in a lower quality product.
It is important to look for supplements that are made from fish that are high in omega-3s and are sustainably sourced.
The best sources are cold-water fish like sardines or anchovies as they are typically better quality, less contaminated and contain higher levels of EPA and DHA compared to other sources of omega-3
2
Potency
It is essential for your Omega 3 supplement to be rich in both EPA and DHA which are the beneficial active ingredients.
While a supplement containing 1,200 mg of fish oil might seem like a lot, it tells you nothing about the omega-3 content (which is what really matters).
A high-quality omega-3 supplement will feature at least 500 milligrams of EPA and DHA per serving which is the rough equivalent of two servings of oily fish per week.
Be sure to check the back label carefully to ensure it contains a potent dose of omega-3s or you could be wasting your money.
3
Form
For fish oil, purity is of the utmost importance, so any good quality product should be tested to ensure it contains low levels of contaminants such as lead or mercury.
The form of omega-3 used in supplement is also important as it can impact its effectiveness.
Triglyceride form is considered the best form of omega-3 as it is more easily absorbed and utilised by the body compared to other forms such as ethyl ester.
Triglyceride form supplements are also less likely to cause fishy aftertaste or other digestive issues.
What To Avoid:
Fillers & Additives
Read the back label of any supplement carefully and watch out for any synthetic fillers or additives. Avoid any unnecessary ingredients or bulking agents such as magnesium stearate, titanium dioxide, starch, iron oxide, or microcrystalline cellulose which don't offer any nutritional benefit.
Your Omega-3 Supplement Checklist:
Satisfaction Guarantee
It's important that any manufacturer stands behind their product and is willing to give your money back if you aren't happy with the results. Many manufacturers now offer an extended returns policy or 100% satisfaction guarantee for as long as 30 or 60 days. This gives you plenty of time to try the supplement "risk free" to make sure it's what you're looking for.
GMP Standards
Buy from a reputable brand that submits their products for multiple rounds of quality testing, from raw ingredients to finished product. Look for products manufactured to the GMP code of conduct. This is a strict set of manufacturing and quality processes that help to ensure you're getting a premium quality, safe and effective product. Look for a manufacturer which adheres to GMP practices and displays this on their website or packaging.
#1 Omega 3 Supplement For 2025: Purolabs High Strength Omega-3
For its ultra concentrated & sustainably-sourced formula packed with EPA & DHA, Puro High Strength Omega-3 is going to be the best bet for most people.
Each serving delivers a potent dose of Omega-3 fatty acids sourced from cold water, wild caught South Pacific anchovies which offer a superior natural fat profile.
The ultra pure formula is Friend Of The Sea certified & 100% free from sketchy additives, fillers & bulking agents which are commonly found in most supplements.
But what really sets it apart is the truly comprehensive 60 day, 100% satisfaction guarantee - allowing you to try the product risk-free for 60 days to ensure you see the benefits.
Why You'll Love High Strength Omega-3
Molecularly-distilled, triglyceride form with less oxidation & better freshness - so no fishy burps or aftertaste!
An abundant source of DHA & EPA omega-3 fatty acids, with no hidden nasties.
Triple-tested for purity, guaranteed to contain no heavy metals, PCBs & other nasties.
Purolabs
High Strength Omega-3
From £18.33 per bottle
With an ultra clean formula that's 100% free of any fillers or unnecessary ingredients, this product is made in the UK to GMP standards and has over 300+ verified 5-star reviews.
Feedback from customers is also extremely impressive - with many people impressed with both the product quality & customer service.
Ratings Breakdown
Quality
The commitment to quality is second-to-none. They focus on the highest-quality, most clinically-tested ingredients without the usual additives or fillers commonly found in most supplements.
Quality
The commitment to quality is second-to-none. They focus on the highest-quality, most clinically-tested ingredients without the usual additives & fillers found in most supplements.
Value
You can definitely find omega-3 supplements cheaper - but if you want true value for money, we think it's worth the investment in your health.
Value
You can definitely find fish oil supplements cheaper - but if you want true value for money, we think it's worth the investment in your health.
Customer Experience
The website is easy to navigate; the delivery is fast and free; and the items come well-packaged. Customer feedback is excellent.
Customer Experience
The website is easy to navigate; the delivery is fast and free; and the items come well-packaged. Customer feedback is excellent.
Brand
While a relative newcomer, the brand has been on the scene for a couple of years now, slowly building their reputation for quality products with premium ingredients.
Brand
While a relative newcomer, the brand has been on the scene for a couple of years now, slowly building their reputation for quality products with premium ingredients
Perks
The product comes with a truly risk-free 60 day 100% satisfaction guarantee so you can try the product first to ensure it's suitable for you.
Perks
The product comes with a truly risk-free 60 day 100% satisfaction guarantee so you can try the product first to ensure it's suitable for you.
Shop Our #1 Pick
High Strength Omega-3 by Purolabs
Other Options Worth Considering:
Wiley's Finest Wild Alaskan Fish Oil
This high strength liquid fish oil formula from family-owned Wiley's is sourced from wild alaskan fish and offers an impressive level of potency & purity.
It claims to have four times more Omega-3 than regular strength fish oil, s suitable for both adults and children and is 100% free from artificial colours and preservatives.
While the orange taste won't be for everyone and some will prefer the convenience of capsules, this is a solid option if you don't mind preparing it daily.
Nordic Naturals are well-known for their extensive range of quality supplements and this is another excellent addition to their range.
Each serving delivers 1280mg of beneficial Omega 3s from wild-caught fish (anchovies and sardines), plus algae. It is naturally lemon-flavoured and delivered in liquid triglyceride form.
With a price tag of £34.99 per bottle, it's definitely a premium option, but the manufacturer does offer a 30 day guarantee if you aren't satisfied.
Vegan Vitality Omega-3 Algae Oil
This vegan-friendly alternative from Vegan Vitality is sourced from algae oil yet provides an impressive 800mg of DHA per 2 capsules.
This product is also tested for contaminants and is verified to be free of heavy metals. The capsules are also easy to swallow and there is no unpleasant aftertaste (a common issue with many fish oil supplements).
This is an ideal option for vegans, with a clean formula and providing good value. Each bottle contains 60 capsules - enough to last for 2 months.
Coramega Omega-3 Orange Squeeze
Orange Squeeze by US-based manufacturer Coramega is an orange flavoured liquid omega-3 supplement that comes in convenient daily sachets that are easy to take with you on go.
Its omega-3s are sourced from small, deep, cold water fish and has been "molecularly distilled for purity" which the manufacturer claims offers superior absorption - by as much as 300% when compared to softgels.
Providing 650mg of Omega-3s per serving, each box costs £37.99 and contain 90 sachets - enough to last for around 3 months.
Shop Our #1 Pick
High Strength Omega-3 by Purolabs
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