7 Ways Omega-3 Quietly Shapes How Your Brain and Body Work

Omega-3 might very well be the most underappreciated nutrient in modern health, not because it is obscure, but because what it actually does in the body is far more wide-ranging than its reputation suggests. We tend to file it away under "heart health" or "good fats" and move on. But with more than 50,000 published studies examining its wide-ranging health impacts and decades of scientific proof to back it up, omega-3 sits in a different category to most supplements.

The two fatty acids at its core — EPA (eicosapentaenoic acid) and DHA (docosahexaenoic acid) — are involved in processes related to brain development, inflammatory regulation, hormonal health, cardiovascular function, and cellular structure. And yet, most of us don't get nearly enough of it each day. Research from 2024 estimates that around 80 to 90% of people don't get enough omega-3. In Britain, where oily fish consumption continues to fall short of public health recommendations, the gap between what we need and what we actually get is significant.

Now one of the UK's most trusted omega-3 specialists, Bare Biology produces what it considers the strongest fish oil available in Britain to try to bridge that gap — its Life & Soul Liquid delivers 4,000mg of omega-3 per serving at clinical strength, while the Life & Soul Daily capsules provide 1,700mg. Every batch is independently certified by the International Fish Oil Standards (IFOS) programme and produced in triglyceride form for superior absorption. The fish oil itself is sourced from the same Norwegian manufacturer the brand has worked with for over 12 years, using fisheries certified by both Friends of the Sea and the Marin Trust.

Here, drawing on the latest research and insight from Bare Biology's Nutritional Therapist, Kirsten Humphreys, we break down seven of the ways omega-3 is quietly shaping your health — including a few impacts you might not have considered.

1. It literally builds your brain

DHA is not simply good for the brain — it is, in a very structural sense, a part of it. Around 40% of the polyunsaturated fatty acids found in the brain's grey matter are made up of DHA, making it one of the most abundant fatty acids in the central nervous system. It also plays an important role in your eye's retina, where it makes up a large proportion of the fatty acids there.

This structural role has implications that extend across your entire lifespan. During pregnancy and early childhood, DHA is essential for neurological development — it is actively transferred from mother to baby in the third trimester, which is one reason why preterm birth carries such a significant nutritional risk. In adulthood, adequate DHA is associated with maintained cognitive function and may help to slow age-related cognitive decline. Research in this area continues to grow, with studies examining its potential role in conditions ranging from ADHD to depression.

The Life & Soul Daily capsules offer a convenient daily dose for those looking to maintain consistent EPA and DHA intake, while the Life & Soul Liquid suits those wanting clinical-strength support.

2. It regulates inflammation in ways that go well beyond joint pain

The word "anti-inflammatory" has become so common in the world of wellbeing that it has nearly lost all meaning. But omega-3's relationship with inflammation is specific and well understood. EPA in particular helps to modulate the body's inflammatory response by influencing the production of signalling molecules called eicosanoids, some of which promote inflammation and some of which resolve it. Research suggests it can potentially help by "reducing inflammatory markers, improving symptoms of mental health, and many other inflammatory-driven health challenges," says Humphreys.

This matters because chronic low-grade inflammation is implicated in a remarkably wide set of conditions — from cardiovascular disease and metabolic syndrome to depression, skin disorders, and menstrual pain. The problem in contemporary diets is structural: we consume a great deal of omega-6 fatty acids (found in vegetable oils and processed foods), which compete with omega-3 for the same enzymes. When omega-6 takes the dominant place in our systems, the inflammatory pathway is preferentially activated.

As Humphreys explains, the goal is not to eliminate omega-6 entirely — many omega-6-rich foods offer genuine nutritional value — but to aim for a healthier ratio. "The focus is to have a healthy, whole-food diet and to increase omega-3 intake to counteract the inflammatory action of the omega-6 pathway," she says, "to help keep the body healthy and in balance."

Bare Biology's omega-3 customers frequently cite reduced joint discomfort and improved recovery as among the first changes they notice, alongside skin clarity and reduced brain fog, suggesting that the anti-inflammatory effects are being felt across multiple systems simultaneously.

3. It supports mood, focus, and mental health

The relationship between omega-3 and mental health is one of the most compelling and most consistently replicated areas in nutritional psychiatry. "In mental health, depression in particular has some good evidence. But the research into neurodiverse challenges — reading, attention, focus and behaviour — is also really exciting, and not something people tend to associate with omega-3," says Humphreys.

A growing body of evidence links low omega-3 intake with higher rates of depression, and meta-analyses have found that EPA supplementation, in particular, can meaningfully reduce depressive symptoms. A 2019 meta-analysis published in Translational Psychiatry found that omega-3 supplementation was associated with a significant reduction in depression compared with placebo, with higher-EPA formulas showing the strongest effect.

The mechanisms are thought to involve omega-3's influence on neurotransmitter signalling, its anti-inflammatory effects in the brain, and its role in maintaining neuronal membrane fluidity — the structural property that allows brain cells to communicate effectively.

Beyond depression, there is also some growing research interest in omega-3's effects on attention and cognitive performance.

4. It protects your cardiovascular system

Omega-3 has some of the strongest evidence in nutritional science when it comes to heart health. Both EPA and DHA contribute to cardiovascular function through several complementary mechanisms: they reduce triglyceride levels in the blood, help to regulate blood pressure, support healthy endothelial function, and have anti-arrhythmic properties. The UK's Medicines and Healthcare products Regulatory Agency (MHRA) has approved claims for omega-3 in relation to heart structure and function, while the European Food Safety Authority (EFSA) permits specific health claims for EPA and DHA at doses above 3g per day in relation to blood pressure and triglyceride reduction.

The British Heart Foundation advises a minimum omega-3 intake of around 450mg per day — a threshold that the majority of Brits do not reach through diet alone. Meeting this through food requires eating oily fish two to three times per week. "We know that many people in the UK are not getting enough omega-3 to even meet the basic requirements, never mind optimal," Humphreys notes.

For those looking to support cardiovascular health specifically, Bare Biology's Life & Soul Liquid — delivering 4,000mg of omega-3 per serving — provides a clinical-strength dose in line with the intakes associated with meaningful effects on triglycerides and blood pressure.

5. It makes a difference for women's health across all life stages

Some of omega-3's most compelling — and least-discussed — benefits relate specifically to women's health. Research has demonstrated reductions in dysmenorrhoea (period pain) with omega-3 supplementation, likely as a result of its influence on the mechanisms responsible for uterine contractions.

During pregnancy, the benefits are substantial. DHA accumulates rapidly in foetal brain tissue during the third trimester, making maternal omega-3 intake critical in late pregnancy. "If a baby is born preterm, they miss out on a large supply of DHA that gets transferred in the third trimester. The fact that omega-3 shows a reduced risk of preterm birth is very exciting," says Humphreys.

Meta-analyses examining omega-3 supplementation in pregnancy have found associations with reduced risk of preterm birth, improved birth weight, and better neurodevelopmental outcomes in children. Postpartum mental health is also an area of active research interest, given the dramatic depletion of DHA that can occur following birth and during breastfeeding.

A high-quality supplement like Bare Biology's Life & Soul Daily capsules — or the Life & Soul Minis for those who prefer a smaller capsule — can help expectant mothers meet the recommended minimum of 300mg of DHA per day, providing nutritional reassurance throughout pregnancy. For plant-based mothers-to-be, the Vim & Vigour vegan omega-3 offers a certified algae-derived alternative.

6. It supports skin health from the inside out

Skin health is perhaps the most underrated area of omega-3 research. EPA and DHA support the skin's lipid barrier, which keeps moisture in and irritants out, and their anti-inflammatory properties have shown benefits for conditions like eczema, psoriasis, and acne.

A 2020 review in the Marine Drugs journal examined the evidence for omega-3 in dermatological conditions, finding that supplementation improved skin hydration, and reduces inflammatory skin responses. The effects are rarely immediate — consistent intake over several months tends to yield the most noticeable results — but many Bare Biology customers cite clearer, more resilient skin as among the first changes they observe.

Humpheys points to the skin barrier's dependence on fatty acid composition as a key mechanism: when omega-3 levels are sufficient, cell membranes in skin tissue are better able to maintain their structure and function, reducing susceptibility to dryness, sensitivity, and inflammatory flares.

7. It works best when it's consistent — and the form matters

Of all the things worth understanding about omega-3, perhaps the most practically important is this: consistency is everything. Omega-3 is not a supplement that produces dramatic results overnight. Building to an optimal omega-3 index — the measure of EPA and DHA as a percentage of total red blood cell fatty acids — takes time. The target range considered optimal by researchers is 8 to 12 per cent; most people, when tested, fall well short of this.

Bioavailability also matters. Omega-3 is better absorbed in triglyceride form than in the ethyl ester form found in many cheaper supplements. All of Bare Biology's Life & Soul products are produced in triglyceride form, which means the fatty acids are more readily taken up by the body. For those taking triglyceride-form omega-3, absorption is efficient enough that it can be taken with or without food — though Humphreys advises that taking it with a meal generally supports digestion for most people. "The most important thing is consistency," she says. "Choosing a time of day that works for you and actually remembering to take it daily."

EFSA considers omega-3 safe at intakes up to 5g per day, meaning that even those eating some oily fish can supplement confidently without exceeding recommended limits. For most people, 1 to 2g per day is a good starting point for long-term health maintenance, with higher doses suited to specific health goals under the guidance of a clinician.

For plant-based eaters, the challenge is compounded by the fact that ALA — the omega-3 found in chia seeds, flaxseed, and walnuts — converts to EPA and DHA very poorly in the body, with estimates suggesting less than 10 per cent of ALA successfully converts. Algae-based supplements such as Bare Biology's Vim & Vigour provide EPA and DHA directly, bypassing the conversion problem entirely.

The bottom line

Omega-3 is not a trend supplement. It is a foundational nutrient with a breadth of evidence that few others can match — and a deficiency that remains strikingly common. Whether your focus is cognitive performance, hormonal health, cardiovascular protection, or simply feeling more like yourself, consistent, high-quality omega-3 intake is one of the most evidence-based interventions available.

Bare Biology's Life & Soul range — available as daily capsules, minis, and liquid, with a vegan option in Vim & Vigour — is available on Healf.

Best Omega-3 Supplements: What To Look For And Why It Matters

Read more

Do I Really Need Omega-3?

Read more

How Bare Biology Founder Melanie Lawson Is Transforming Our Health, One Supplement At A Time

Read more