I took fish oil for three years. CVS brand, two capsules a day, just like the bottle said. Then I tested my omega-3 index. It came back at 4.1% — the same risk category as someone who doesn't supplement at all.
Three years of horse pills. Essentially nothing to show for it.
The Data
35% lower risk of fatal coronary heart disease in the highest omega-3 index quintile vs. lowest (JAMA Cardiology, 2018 — 45,000+ participants)
Target index: 8-12%. Average American sits at 4-5%. Below 4% = highest cardiac death risk
Low omega-3 index was a stronger mortality predictor than smoking in some models (UK Biobank, 117,000 participants, 2022)
Ethyl ester fish oil absorbs 50-70% less than triglyceride form (Dyerberg et al., 2010)
Most OTC capsules deliver only 300mg EPA+DHA per pill — you need 2-4 grams/day to move the needle
When I switched to triglyceride-form fish oil at 3g/day, my index went from 4.1% to 9.8% in four months. Same diet, same genetics. Just the dose and form.
What To Do
Dose up. Take 2-4 grams of combined EPA+DHA daily, not the 300-600mg most bottles suggest. Peter Attia calls the standard dose "homeopathic."
Buy triglyceride form. Check the label — skip ethyl ester (most cheap brands). Nordic Naturals and Thorne Super EPA both use triglyceride form with third-party testing.
Take it with fat. A 2019 study found absorption increased up to 3x when taken with a fat-containing meal vs. empty stomach. Breakfast with eggs works.
Test your index. An OmegaQuant test costs ~$55, takes five minutes with a finger prick, and is the only way to know if your supplementation is actually working.
Product Pick
Thorne Super EPA — triglyceride form, NSF Certified for Sport, concentrated enough that 2-3 capsules gets you into therapeutic range. It's what moved my index from the danger zone into the protective range.
Quick Hit
The omega-6 ratio matters. Americans eat a 15:1 to 20:1 omega-6 to omega-3 ratio (ancestral estimate: 1:1 to 4:1). Supplementing EPA+DHA is the easiest lever — it literally changes your cell membrane composition over time, shifting inflammatory signaling back toward baseline.
A $5-a-month fish oil habit gave me a false sense of security for three years while my actual omega-3 status sat in the danger zone. The fix was a better form, a real dose, and a $55 test. Don't guess — measure.
Do you know your omega-3 index? Hit reply and tell me.
Want the complete supplement protocol? The Essential Supplement Stack Guide breaks down exactly what to take, when, and why — based on the research we cover in this newsletter. Get it for $9.99.