Summary:
What are the main health benefits of Omega 3 fatty acids?
Omega 3s are essential for every cell in the body. Benefits include supporting heart health by managing triglyceride levels and blood pressure, promoting cognitive function and brain health, and maintaining normal vision. These polyunsaturated fatty acids (PUFAs) ensure your heart stays in top shape while keeping your mind sharp enough for complex mental tasks.
What is the difference between ALA, EPA, and DHA Omega 3s?
Omega 3s are a dynamic trio. ALA is a plant-based pioneer found in flax and chia seeds, supporting growth and heart function. EPA supports healthy blood pressure and triglycerides. DHA is critical for vision and cognitive health. While the body can convert ALA into EPA and DHA, the process is inefficient; therefore, direct intake from oily fish or supplements is often recommended for optimal health.
How much oily fish should you eat per week?
To maintain heart and brain health, experts recommend at least two 140g servings of fish per week, including one portion of oily fish like salmon, mackerel, or sardines. Most people fall short of this target. However, those who are pregnant should limit their intake to a maximum of two oily fish portions weekly. For non-fish eaters, high-quality algal oil or fish oil supplements can help bridge the nutritional gap.
What are the best plant-based sources of Omega3?
If you don't eat fish, you can get omega 3 in the form of ALA (Alpha Linolenic Acid) from flaxseeds, chia seeds, walnuts, and pumpkin seeds. Ground seeds are better for absorption. Other sources include rapeseed oil, tofu, and edamame. For a direct source of EPA and DHA without the seafood, algal oil is a highly effective vegan supplement. These options provide the essential fats needed to support heart function, healthy vision and cognitive health.
Tired of feeling like a deflated balloon? Want a brain that fires on all cylinders, a heart that beats like a drum solo and perky peepers? Enter omega 3s, the "healthy fats", known as polyunsaturated fatty acids (PUFAs). PUFAs are a super-powered family with potential benefits ranging from a happy heart, healthy vision, to a brain that's sharp enough to win The Traitors.
So, how much do you really need? And is it time to enlist the help of a supplement? Let's dive into the delicious details and get you up to speed!
Why Do We Need Omega 3s?
Omega 3s diligently work inside every single cell of your body (1). They're the master builders of cell membranes and the architects of crucial bodily functions, from perking up your peepers, keeping your ticker in top shape, to supporting your cognitive health.
One of their star talents? Keeping those pesky triglyceride levels (the "fat in your blood" kind) in check . Too many of these party crashers can spell trouble for your heart, so omega 3s are like the bouncers keeping things orderly. They’re also considered pretty good at keeping your blood pressure from getting out of hand. Basically, they're the ultimate health multitaskers! (2)
What Are Omega 3s?
Think of omega 3s as a dynamic trio, each with their own special skills:
ALA (Alpha-Linolenic Acid): The Plant-Powered Pioneer. This essential fat is your body's DIY expert, found in flaxseed, chia, and walnuts. The body uses it to help maintain heart function and support normal growth and development (3).
Top Tip: Grind your flaxseed and chia seeds before eating to make the ALA more available for absorption! (4)
While your body can convert ALA into EPA (Eicosapentaenoic Acid) and DHA (Docosahexaenoic Acid), this conversion process is often inefficient. For optimal intake of these beneficial omega 3s, the most effective dietary sources are oily fish and seafood (5).
EPA (Eicosapentaenoic Acid): The Marine Maestro. Straight from the sea (think salmon, mackerel, herring), EPA teams up with DHA to keep your blood pressure chill, triglycerides low, and heart functioning normally (6).
DHA (Docosahexaenoic Acid): The Brainy Brawn. Also, a seafood superstar, DHA is like brain food! It's crucial for normal vision (7), sharp cognitive function (8), and a healthy heart (9).
How Much Omega 3 Do You Need?
The folks at the Committee on Medical Aspects of Food Policy (COMA) – clearly a group who knows their cod from their mackerel – suggest we all aim for at least two servings of fish a week, with one being of the oily variety (think anchovies, salmon and pilchards). Apparently, most of us in the UK are falling short on the oily fish front, which is a shame, because a little more oily fish in our lives can bring more heart health (10).
Top Tip: The average fish portion size for adults is 140g (10).
Expecting a little bundle of joy? The NHS advice is to limit oily fish consumption to a maximum of two portions a week (11).
Omega 3s: Your Dietary Decoder!
Ready to boost your omega 3 game? Here’s your cheat sheet:
- White Fish Wonders: Sea bass, turbot, halibut, oysters, mussels – aim for one portion weekly.
- Oily Fish Powerhouses: Salmon, sardines, mackerel, trout – one portion a week and no more than two portions if you’re pregnant.
- Plant-Based Power-Ups: Flaxseed, pumpkin seeds, chia seeds, walnuts, hempseed oil, rapeseed oil, flaxseed oil, soy products (tofu, edamame, soy milk). Sprinkle, drizzle, and devour!
- Supplement Savvy: If you’re not a fish fan, explore high-quality algal oil (vegan!) or taste-free fish oil supplements containing both EPA and DHA.
Key Takeaway:
Omega 3s are crucial for a happy heart, healthy vision and cognitive health.
If you're new to the world of omega 3 supplements, we've got your back. Contact our expert Nutrition Advisors with your questions or explore our range of marine and vegan omega 3. Your body (and brain) will thank you!
Disclaimer: This article offers informational advice and is not a substitute for professional medical care. While we strive for accuracy and up-to-date information, always consult your GP or healthcare professional before using supplements or alternative products, especially if you have existing medical conditions or are under medical supervision.
References:
- Krupa KN, Fritz K, Parmar M. Omega-3 fatty acids. Treasure Island (FL): StatPearls Publishing; 2024. (cited 28/04/2026) https://www.ncbi.nlm.nih.gov/books/NBK564314
- Office of Dietary Supplements. Omega-3 fatty acids: Health sheet for health professionals (cited 28/04/2026) https://ods.od.nih.gov/factsheets/Omega3FattyAcids-HealthProfessional
- www.webmd.com. (n.d.). Alpha-Linolenic Acid (Ala): Uses, Side Effects, Interactions, Dosage, and Warning. [online] Available at: https://www.webmd.com/vitamins/ai/ingredientmono-1035/alpha-linolenic-acid-ala.
- Jantz, K. and Examine.com (2023). Alpha-Linolenic Acid Health benefits, dosage, and side effects. [online] Examine.com. Available at: https://examine.com/supplements/alpha-linolenic-acid-ala/?srsltid=AfmBOop5y3Q1nS3vXPIZYN3v3Nd6VnV9odkg0YNuzOpg4-ZXSg82ObXG&show_conditions=true [Accessed 28 Apr. 2026].
- Takic, M., Pokimica, B., Petrovic-Oggiano, G. and Popovic, T. (2022). Effects of Dietary α-Linolenic Acid Treatment and the Efficiency of Its Conversion to Eicosapentaenoic and Docosahexaenoic Acids in Obesity and Related Diseases. Molecules (Basel, Switzerland), [online] 27(14), p.4471. doi: https://doi.org/10.3390/molecules27144471.
- American Heart Association (2022). Consuming about 3 grams of omega-3 fatty acids a day may lower blood pressure. [online] www.heart.org. Available at: https://www.heart.org/en/news/2022/06/01/consuming-about-3-grams-of-omega-3-fatty-acids-a-day-may-lower-blood-pressure.
- Shindou, H., Koso, H., Sasaki, J., Nakanishi, H., Sagara, H., Nakagawa, K.M., Takahashi, Y., Hishikawa, D., Iizuka-Hishikawa, Y., Tokumasu, F., Noguchi, H., Watanabe, S., Sasaki, T. and Shimizu, T. (2017). Docosahexaenoic acid preserves visual function by maintaining correct disc morphology in retinal photoreceptor cells. Journal of Biological Chemistry, 292(29), pp.12054–12064. doi: https://doi.org/10.1074/jbc.m117.790568.
- Weiser, M., Butt, C. and Mohajeri, M. (2016). Docosahexaenoic Acid and Cognition throughout the Lifespan. Nutrients, 8(2), p.99. doi: https://doi.org/10.3390/nu8020099.
- W, B.L., L, G.E., Den, V., Stroes, E S G, Kroon, J., Snaterse, M., Martens, M, B.S. and T, J.H. (2025). High serum EPA and DHA levels are inversely associated with cardiovascular mortality in different arterial territories. European Heart Journal, [online] 46(Supplement_1). doi: https://doi.org/10.1093/eurheartj/ehaf784.3448.
- SACN (2004). Advice on fish consumption: benefits & risks. [online] Available at: https://assets.publishing.service.gov.uk/media/5a7dbedc40f0b65d88634277/SACN_Advice_on_Fish_Consumption.pdf.
- NHS (2020). Foods to avoid in pregnancy. [online] NHS. Available at: https://www.nhs.uk/pregnancy/keeping-well/foods-to-avoid/.
