Most people who take Omega-3s are wasting their money.
Not because Omega-3s don't work — the evidence for them is among the strongest in nutritional science. But because the dose most people take is too low, the form is often wrong, and almost nobody actually measures whether it's working.
Today we're fixing that.
Why Omega-3s Matter for Longevity
The research on Omega-3 fatty acids — specifically EPA and DHA — is extensive. A 2022 meta-analysis published in the Journal of the American Heart Association analyzed over 40 randomized controlled trials and found significant reductions in cardiovascular mortality, triglycerides, and systemic inflammation among people with adequate Omega-3 intake.
But the more useful frame is the Omega-3 Index: the percentage of EPA and DHA in your red blood cell membranes. This is a direct measure of how much Omega-3 is actually in your tissues, not just how much you're swallowing.
An Omega-3 Index above 8% is associated with significantly lower cardiovascular risk. The average American sits between 4-5%. That gap — between where most people are and where the protective effects kick in — is what we're addressing today.
The Form Problem
Walk into any pharmacy and most fish oil supplements are in the ethyl ester form. It's cheaper to manufacture and it's what ends up in the bargain brands. The problem: ethyl ester Omega-3s have significantly lower bioavailability than triglyceride form Omega-3s, particularly when taken without a high-fat meal.
A 2010 study in the European Journal of Clinical Nutrition found triglyceride form Omega-3s were absorbed 70% more effectively than ethyl ester form. If you're taking a bargain fish oil, you may be getting a fraction of the dose you think you're getting.
What to look for on the label: "triglyceride form" or "re-esterified triglycerides." If it doesn't say, assume it's ethyl ester.
The Dose Problem
The standard recommendation of 1,000mg of fish oil per day is almost certainly too low for most people starting from a depleted baseline.
1,000mg of fish oil typically contains around 300mg of combined EPA and DHA. To meaningfully move your Omega-3 Index, most people need 2,000-3,000mg of combined EPA and DHA daily — which means 6-10 standard fish oil capsules.
This is why many longevity physicians have moved toward concentrated Omega-3 formulations that deliver 2-3g of EPA/DHA in 2-3 capsules rather than requiring you to take a handful of pills.
The Oxidation Problem
Fish oil oxidizes. When it does, it not only loses potency — oxidized fish oil may actually increase inflammation rather than reduce it. The tell is the smell: fresh, high-quality fish oil should smell mild and oceanic, not fishy or rancid.
Two practices that help: store your fish oil in the freezer (frozen capsules are just as bioavailable and dramatically slower to oxidize), and buy from brands with third-party testing for oxidation markers.
How to Measure Whether It's Working
Here's what separates informed supplementation from guesswork: you can actually test your Omega-3 Index. OmegaQuant offers a home finger-prick test for around $50. You collect a few drops of blood, mail it in, and get your exact index back within a week.
Test before you start supplementing. Retest after 90 days. Adjust your dose based on your results. This is how you know it's working.
What I Use
For a concentrated, triglyceride-form Omega-3 with third-party testing, Momentous Omega-3 is what I currently recommend. It delivers 2g of EPA/DHA per serving in triglyceride form and is NSF Certified for Sport.
The Bottom Line
Omega-3s work. The evidence is robust and consistent. But most people are under-dosing with a sub-optimal form and have no idea whether it's actually moving the needle.
Fix the form. Fix the dose. Measure your index. That's the whole protocol.
Disclosure: The Momentous link above is an affiliate link. I only recommend products I would personally use and would recommend regardless of compensation.