Omega-3 vs. Omega-6: Understanding Your Fat Balance

Fat was once the villain of nutrition. Today we know that the type of fat matters far more than the total amount. Two families of polyunsaturated fats, omega-3 and omega-6, are essential: your body cannot make them, so you must get them from food. This guide explains what they do, why their balance is discussed so often, and how to improve your intake.

Meet the Omega Family

Omega-3 fatty acids

ALA (alpha-linolenic acid): the plant omega-3, found in flaxseed, chia, walnuts, hemp seeds and canola oil.
EPA (eicosapentaenoic acid): found mainly in oily fish and fish oils.
DHA (docosahexaenoic acid): found in oily fish and algae; a major structural fat in the brain and retina.

The body converts only a small percentage of ALA into EPA and DHA, often estimated at under 10 percent, so direct sources of EPA and DHA are valuable.

Omega-6 fatty acids

LA (linoleic acid): the main omega-6, found in vegetable oils such as soybean, corn, sunflower and safflower, plus nuts and seeds.
Arachidonic acid (AA): found in meat, eggs and dairy, and made from LA in the body.

Grilled fish with cooked vegetables. Photo: Unsplash

What Do They Do?

Both families are built into cell membranes and are used to make signalling molecules called eicosanoids, which regulate inflammation, blood clotting and blood vessel function. Broadly, molecules derived from EPA and DHA tend to be less inflammatory and help resolve inflammation, while some omega-6-derived molecules are involved in starting inflammatory responses. Both are needed: inflammation is a vital part of healing when it is balanced.

The Ratio Debate

Researchers estimate that ancestral human diets had an omega-6 to omega-3 ratio of roughly 1:1 to 4:1. Modern Western diets, rich in vegetable oils and processed foods, may be closer to 15:1 or higher. Some scientists argue this shift contributes to chronic inflammation.

Others point out that linoleic acid itself is associated with lower heart disease risk in many studies, and the American Heart Association does not recommend cutting omega-6 intake. Most experts agree on the practical message: the bigger problem is too little omega-3, not too much omega-6. Increasing EPA and DHA is the priority.

Health Areas Linked to Omega-3s

Heart: EPA and DHA lower triglycerides; eating fish twice a week is associated with lower risk of cardiac death. See our heart health guide.
Brain: DHA is essential for brain development in infants and is studied for cognitive ageing; see brain health habits.
Eyes: DHA is concentrated in the retina; read our eye health guide.
Joints: fish oil has been studied for joint stiffness in some inflammatory conditions; see joint health.
Pregnancy: DHA supports fetal brain and eye development.

Best Food Sources of EPA and DHA

Oily fish: salmon, mackerel, sardines, herring, anchovies and trout. The SMASH acronym (salmon, mackerel, anchovies, sardines, herring) is an easy reminder.
Fish liver oils: such as Green Pasture Fermented Cod Liver Oil and Fermented Skate Liver Oil, which also provide vitamins A and D. Read our guides to cod liver oil and skate liver oil.
Algae oil: a vegan source of DHA and EPA.
Pasture-raised eggs and omega-3-enriched eggs, in smaller amounts.

Practical Ways to Improve Your Balance

Eat oily fish at least twice a week, as the American Heart Association recommends.
Add ground flaxseed or chia seeds to breakfast.
Snack on walnuts.
Cook with extra virgin olive oil, which is rich in monounsaturated fat, for everyday use.
Reduce deep-fried and ultra-processed foods, which are often high in refined vegetable oils.
Consider a quality fish or algae oil if you rarely eat fish, after checking with your doctor.

Choosing a Fish Oil Supplement

Check EPA and DHA content per serving, not just total "fish oil".
Look for third-party testing for contaminants such as mercury and PCBs.
Choose sustainably sourced products, such as MSC-certified oils.
Store in a cool, dark place; omega-3s oxidise easily.

Safety

High doses of fish oil may increase bleeding risk, especially with blood thinners.
Fish liver oils contain vitamin A; avoid excessive totals, especially during pregnancy. See our vitamin A guide.
People with fish allergies should avoid fish-derived products.
Some studies have linked high-dose omega-3 supplements with a small increase in atrial fibrillation risk; discuss high doses with your doctor.

Frequently Asked Questions

Are plant omega-3s enough?

Flax, chia and walnuts provide ALA, but the body converts only a small amount to EPA and DHA. Vegetarians and vegans may consider algae oil for direct DHA and EPA.

Is canned fish a good source?

Yes. Canned sardines, salmon and mackerel are affordable, convenient sources of omega-3s, and canned salmon with bones also provides calcium.

Should I cut out vegetable oils?

Most experts recommend focusing on adding omega-3s rather than eliminating omega-6s. Reducing deep-fried and ultra-processed foods naturally lowers excess refined oils.

The Takeaway

Omega-3 and omega-6 fats are both essential. For most people, the most useful step is to eat more omega-3s from oily fish, seeds and walnuts, and fewer ultra-processed foods. Traditional fish liver oils can help fill gaps when used thoughtfully. Learn more about inflammation-friendly eating in our anti-inflammatory eating guide.

Disclaimer: This article is for general educational purposes only. These statements have not been evaluated by the Food and Drug Administration. Live Pine products are not intended to diagnose, treat, cure or prevent any disease. Always consult a qualified healthcare professional before starting a new supplement, especially if you are pregnant, nursing, taking medication or managing a health condition.