Fish Oil vs Omega 3-6-9: How to Read EPA and DHA on the Label
Fish oil and omega 3-6-9 blends sound similar but deliver different things. This guide explains what EPA, DHA, ALA and the omega-6 and omega-9 fats are, and how to read the numbers on a label.
By UAE Peptide Clinic Research Desk
Walk down any supplement aisle and you will find fish oil and omega 3-6-9 sitting side by side, often described in near-identical language. They are not the same thing. One is a concentrated source of two specific long-chain omega-3 fats; the other is a blend of several different fatty acids from different oils. Understanding the difference makes it much easier to choose sensibly, and to read what a label is actually telling you.
EPA and DHA: the long-chain omega-3s
Eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) are the omega-3 fats found in oily fish such as salmon, sardines and mackerel. They are the forms most studied in human research, and European Food Safety Authority assessments recognise that EPA and DHA together contribute to normal heart function, at an intake of around 250 mg a day, and that DHA contributes to the maintenance of normal brain function and vision, again at around 250 mg a day.
A fish oil softgel is therefore best judged by how much EPA and DHA it contains, not by the headline oil weight. A label that says 1000 mg of fish oil does not mean 1000 mg of EPA and DHA. Figures such as 33/22 usually indicate the proportion of EPA and DHA in the oil, which for a 1000 mg softgel works out at roughly 330 mg EPA and 220 mg DHA. Always check the supplement facts panel for the actual milligram amounts per serving.
What an omega 3-6-9 blend contains
An omega 3-6-9 product combines oils, commonly from fish, flaxseed and borage. Each contributes something different, and the balance is quite unlike a dedicated fish oil.
- Omega-3 from fish oil contributes EPA and DHA, but usually in smaller amounts than a dedicated fish oil softgel.
- Omega-3 from flaxseed is alpha-linolenic acid (ALA), a plant omega-3. The body converts only a small fraction of ALA into EPA and DHA, so it is not a like-for-like substitute.
- Omega-6 from borage is largely gamma-linolenic acid (GLA). Most people already eat plenty of omega-6 through cooking oils, nuts and processed foods.
- Omega-9 is mainly oleic acid, the fat abundant in olive oil. The body can make it, and it is not considered an essential fatty acid.
For this reason, a blend can be a reasonable general addition to a varied diet, but it should not be assumed to provide the same EPA and DHA intake as fish oil. If EPA and DHA are the goal, compare the milligram figures for those two fats specifically.
The number that matters on a fish oil label is the combined EPA and DHA per serving, not the size of the softgel.
Food first, then form, dose and timing
Regular portions of oily fish are the most direct dietary source of EPA and DHA, and a supplement is generally considered for people who rarely eat fish or who follow a diet that excludes it. Omega-3 fats are fat-soluble, so taking a softgel with a meal that contains some fat is a common approach, and splitting a larger daily amount across meals can be easier on the stomach. Some people notice a fishy aftertaste; storing softgels in a cool, dry place and choosing a product that is fresh and well sealed are sensible habits.
Third-party testing for oxidation and contaminants is also worth looking for on any marine oil, since omega-3 oils are prone to oxidation if poorly handled. Regulatory bodies have generally treated combined EPA and DHA intakes of up to around 5 g a day from supplements as an upper boundary for adults, which is far above what a single softgel provides.
Who should speak to a doctor first
Omega-3 supplements are food supplements, not medicines, and they are not a replacement for medical care. Anyone who is pregnant or breastfeeding, taking medication, or managing a medical condition should speak to a doctor before starting them. This applies especially to people taking blood-thinning medication or treatment for blood pressure, those with a fish or shellfish allergy, and anyone with an upcoming surgical procedure, because omega-3 fats can influence how blood clots.
If you would like these nutrients built into a simple daily routine, our Energy & Longevity Protocol brings fish oil together with other daily foundations at /supplements/stacks/energy-longevity, and the individual products are described at /supplements/fish-oil-33-22-1000mg and /supplements/omega-3-6-9-1000mg. You can also book a free consultation at /book if you would like a clinician's view first.
