Few adults eat oily fish regularly
Intake is below what supports heart and brain health.
Advertorial
Product Reviews > Health & Beauty > Omega 3 Supplements
Our Top Omega-3 Supplements of 2025: Buyer’s Guide
Unlocking the Power of Essential Fatty Acids for Optimal Health
Discover the science-backed benefits of omega-3 and learn why these essential nutrients are crucial for your heart, brain, joints, and overall wellbeing.
Sarah Tyler, MSc. RNutr,
Last updated: 09 August, 2025
Expert Reviewed
Evidence-Based
UK Focused
What are Omega-3s?
Omega-3 fatty acids are specialised nutrients that your body requires but cannot produce in sufficient quantities. This is why they are classified as "essential fatty acids". You must obtain them through food or supplements. These important fatty acids serve as building blocks for cell membranes throughout your body, with particularly high concentrations in your brain, heart, and eyes.Understanding omega-3 fatty acids provides the foundation for making informed decisions about your long-term health.
Understanding Omega-3 Fatty Acids
There are three main types of Omega-3s that power your health, EPA, DHA, and ALA.
EPA and DHA mostly come from oily fish (such as salmon, mackerel, and sardines); ALA is plant based.
Here is what each does:
EPA
Eicosapentaenoic Acid
The inflammation fighter and mood stabiliser. Essential for heart health and emotional wellbeing.
DHA
Docosahexaenoic Acid
The brain and eye specialist. Critical for cognitive function, memory, and vision health.
ALA
Alpha-Linolenic Acid
The plant-based omega-3 found in flaxseeds and walnuts.
Key insight
EPA and DHA from marine sources provide the most significant health benefits. Vegan and vegetarian diets do not contain EPA and DHA, making direct supplementation with fish oil very important.
Cardiovascular Health Benefits
The cardiovascular benefits of omega-3s are among the most extensively researched and documented. These essential fatty acids act as natural cardio protectors through multiple mechanisms.
Blood Pressure Regulation
Omega-3s help relax blood vessel walls, supporting healthy circulation and reducing strain on the cardiovascular system...
Triglyceride Management
High triglycerides are a major cardiovascular risk factor. Omega-3s, particularly EPA, can reduce triglyceride levels substantially...
Inflammation Reduction
Chronic inflammation is recognised as a key driver of heart disease. Omega-3s generate specialised pro resolving mediators...
Heart Rhythm Regulation
Omega-3s can help stabilise heart rhythm, which may reduce the risk of arrhythmias that lead to sudden cardiac events...
Brain Health and Cognitive Function Benefits
Omega-3s are essential for optimal brain function, supporting memory, mood, and cognitive performance across life.
Memory and learning
DHA supports synaptic plasticity, helping your brain form and strengthen connections for better recall and quicker learning.
Mood balance
EPA helps support healthy neurotransmitter activity, which is linked to emotional stability and day to day mental clarity.
Cognitive protection
Regular omega-3 intake helps maintain cognitive function over time, supporting brain health as you age.
Neural signalling
Omega-3s support flexible cell membranes, improving how signals travel between neurons for focus and faster processing.
The UK’s Omega 3 gap
Most UK adults do not get enough omega 3 for heart, brain and immune health, mainly because oily fish is rarely on the menu.
Most diets lack marine omega 3
Typical meals do not provide enough EPA and DHA.
Daily target often missed
Aim for a steady intake across the week.
How to close the gap
1
Eat two portions of oily fish a week, for example salmon, mackerel, sardines, herring or anchovies.
2
Cook smart, use olive or rapeseed oil more often, use less sunflower or corn oil.
3
Supplement daily for consistency, choose a high purity fish oil or algae oil that is independently tested for heavy metals and oxidation.
Sources: National Diet and Nutrition Survey, NHS guidance, EFSA scientific opinions
We Tested the Top 5 Brands
With so many joint supplements on the market, finding the right one isn’t easy. We reviewed dozens based on formulation, ingredient quality, dosage accuracy, ordering ease, manufacturing standards, and delivery speed.
We asked:
• Do they have quality, proven ingredients?
• Are the doses right?
• What do customers say?
• Is there a money-back guarantee?
• Is it good value?
See below for the best Omega 3 supplements proven to support brain, heart, eye and general health.
PROS
- High-Potency Formula
- 2000mg fish oil
- 660mg EPA & 550mg DHA per serving
- Made in the UK
- Free UK Delivery
- 30 Day Money Back Guarantee
CONS
- Only Available Online
- Available in the UK only
When it comes to purity, strength, and transparency in Omega 3 supplements, Nutracene’s Omega 3 formula firmly sets itself apart. After comparing dozens of products across the UK market, this one impressed us with its clinical-strength dosage and clean formulation.
Each daily serving delivers 2000mg of fish oil, including 660mg of EPA and 550mg of DHA — two of the most important omega-3 fatty acids backed by research for heart, brain, eye, and joint health. These levels are notably above average compared to many high street brands, some of which contain less than half this amount.
Equally important is the purity and sourcing. Nutracene’s formula is made in the UK from molecularly distilled fish oil, a process designed to remove heavy metals and contaminants, while preserving potency. The capsules are also free from unnecessary additives, making them a great choice for those with sensitivities.
Where many Omega 3 supplements rely on vague labeling or low-potency oil blends, Nutracene clearly spells out its EPA and DHA content, the kind of transparency we believe is essential when choosing a supplement with real clinical benefit.
For anyone looking for a straightforward, powerful Omega 3 supplement, Nutracene offers one of the most reliable options on the market. It also comes with a 30-day money-back guarantee, which reflects the confidence behind the formula.
* Rankings and results are based on personal opinions and may not represent typical user experiences. For more information, please refer to the official product website.
PROS
- Single daily capsule
- Purification standards
- High-Strength
CONS
- Lower EPA/DHA content
- Larger capsule size
- Not suitable for vegans or vegetarians
Inessa’s Omega 3 offers 1200mg of fish oil per capsule, delivering 480mg EPA and 360mg DHA. A moderate strength formulation that meets recommended daily intake levels in a single dose. The fish oil is presented in triglyceride form and undergoes a patented purification process designed to reduce contaminants below EU and GOED standards.
The product uses sustainably sourced fish oil from wild anchovies and carries Friends of the Sea certification. The capsules are made from fish gelatine rather than pork or beef gelatine, which may suit certain dietary preferences. Natural vitamin E is included as a preservative.
The single-capsule daily dosage offers convenience compared to multi-capsule regimens, though the overall EPA and DHA content is lower than some high-potency alternatives on the market. The manufacturer notes that higher dose omega-3 capsules tend to be larger in
* Results and rankings are based on subjective opinion and do not necessarily reflect typical results from the use of these products. Please visit product website for more information.
PROS
- Molecular distillation purification
- No Artificial Flavours
CONS
- Limited third-party certification
- No Money Back Guarantee
Nordic Supplements delivers 1000mg of fish oil per capsule, containing 180mg EPA and 120mg. This represents a lower potency formulation compared to many concentrated omega-3 products available in the UK market.
The fish oil is sourced from wild-caught anchovies and sardines and the brand states its products are manufactured and certified in the UK under high manufacturing standards. Nordic Supplements uses cold pressing, triple filtration, and molecular distillation processes for purification.
The brand, which was formerly known as Nordic Oil before rebranding to Nordic Supplements, positions itself as a budget-friendly option in the UK supplement market. A single daily capsule is the recommended serving.
* Results and rankings are based on subjective opinion and do not necessarily reflect typical results from the use of these products. Please visit product website for more information.
4. Omega 3 Fish Oil
by Now foods
PROS
- Non GMO
- No Artificial Flavours
- Distilled for purity
CONS
- Low EPA/DHA potency - 300mg combined
- Below therapeutic dosages
Now Foods offers 1000mg of fish oil per softgel, delivering 180mg EPA and 120mg DHA. This represents a basic-strength formulation, with the recommended serving being two softgels daily to reach 600mg combined omega-3s.
The fish oil is molecularly distilled and manufactured under strict quality control standards, with testing conducted for potentially harmful contaminants such as PCBs, dioxins, mercury and other heavy metals. The fish oil sources include anchovies, sardines, and tuna and the product carries Non-GMO and GMP Quality Assured certifications.
Now Foods is a family-owned company and positions itself in the value segment of the supplement market. The softgels contain bovine gelatin rather than fish or plant-based alternatives.
* Results and rankings are based on subjective opinion and do not necessarily reflect typical results from the use of these products. Please visit product website for more information.
5. Eskimo-3 Fish Oil
by Metagenics
PROS
- Small capsules easier to swallow
- Enhanced with vitamin E
CONS
- Low potency 390mg
- Requires 3-6 capsules daily
Eskimo-3 provides 240mg EPA and 150mg DHA per three mini-capsules, delivering a total of 390mg combined omega-3s in the standard formulation.
The fish oil contains EPA and DHA in their natural 3:2 ratio as found in oily fish, presented in triglyceride form. The product is enriched with vitamin E and Pufanox, an antioxidant mixture, for enhanced freshness and stability. Eskimo-3 is sustainably sourced.
Nutri Advanced has transitioned to the Metagenics brand. The standard formulation uses mini-capsules designed for easier swallowing, though this requires a higher capsule count to reach therapeutic doses.
* Results and rankings are based on subjective opinion and do not necessarily reflect typical results from the use of these products. Please visit product website for more information.
Amongst the top Omega 3 supplements we’ve reviewed, Nutracene stands out as a leader in both quality and potency.
Each serving provides a high-strength 2000mg dose of fish oil, providing 660mg EPA and 440mg DHA.
MADE IN THE UK
FREE UK
DELIVERY
MADE TO GMP
STANDARDS
References
- NHS. Eat well, fish and shellfish. 2023. Available from.
- Department of Health and Social Care. National Diet and Nutrition Survey, results from years 9 to 11 (2016 to 2019), statistical summary. 2020. Available from.
- Derbyshire E. Oily fish and omega-3s across the life stages, a focus on intakes and future directions. Nutrients. 2019;11(8). doi:10.3390/nu11081966.
- European Food Safety Authority (EFSA) NDA Panel. Scientific opinion on dietary reference values for fats. EFSA Journal. 2010;8(3):1461. doi:10.2903/j.efsa.2010.1461.
- European Food Safety Authority (EFSA) NDA Panel. Scientific opinion on the tolerable upper intake level of EPA, DHA and DPA. EFSA Journal. 2012;10(7):2815. doi:10.2903/j.efsa.2012.2815.
- National Institutes of Health, Office of Dietary Supplements. Omega-3 fatty acids, health professional fact sheet. 2022. Available from.
- Harris WS, von Schacky C. The omega-3 index, a new risk factor for death from coronary heart disease. Preventive Medicine. 2004;39(1):212-220. doi:10.1016/j.ypmed.2004.02.030.
- Simopoulos AP. An increase in the omega-6, omega-3 fatty acid ratio increases the risk for obesity. Nutrients. 2016;8(3):128. doi:10.3390/nu8030128.
- Skulas-Ray AC, Wilson PWF, Harris WS, Brinton EA, Kris-Etherton PM, Richter CK, et al. Omega-3 fatty acids for the management of hypertriglyceridaemia, a science advisory from the American Heart Association. Circulation. 2019;140(12):e673-e691. doi:10.1161/CIR.0000000000000709.
- Zhang X, et al. Omega-3 polyunsaturated fatty acids intake and blood pressure, a dose-response meta-analysis of randomised trials. Journal of the American Heart Association. 2022;11(12):e025071. doi:10.1161/JAHA.121.025071.
- Bhatt DL, Steg PG, Miller M, et al. Cardiovascular risk reduction with icosapent ethyl for hypertriglyceridaemia. New England Journal of Medicine. 2019;380:11-22. doi:10.1056/NEJMoa1812792.
- Dyall SC. Long-chain omega-3 fatty acids and the brain, a review of the independent and shared effects of EPA, DPA and DHA. Frontiers in Aging Neuroscience. 2015;7:52. doi:10.3389/fnagi.2015.00052.
- Weiser MJ, Butt CM, Mohajeri MH. Docosahexaenoic acid and cognition throughout the lifespan. Nutrients. 2016;8(2):99. doi:10.3390/nu8020099.
- Harvard T. H. Chan School of Public Health. The Nutrition Source, omega-3 fats. Available from.