Swap the raw material
Cell membranes are built from the fats you eat. EPA and DHA displace omega-6 arachidonic acid - the feedstock for the most aggressive inflammatory signals - so when inflammation fires, the signals produced are 10-30× weaker versions.
Switch resolution on
Beyond dampening, enzymes convert EPA and DHA into resolvins, protectins, and maresins - dedicated stop signals that actively shut inflammation down and start cleanup. Rock-solid in the lab; genuinely hard to measure in blood at supplement doses.
Partners pull the trigger
The conversion machinery often needs activation: statins and low-dose aspirin chemically modify the enzymes that make these stop signals, and a low-omega-6 diet frees up the pathway. A leading theory for why omega-3 keeps working better as an add-on than alone.
This membrane-swap mechanism explains the field's signature timing: effects build over weeks as membranes turn over, not hours. It explains the dose thresholds in inflammatory disease - below a real intake, membrane composition barely moves. And it explains the add-on pattern that recurs from arthritis to migraine: partner therapies and diet changes activate or unblock the same enzymatic pathway omega-3 feeds.
A caution the marketing skips: two flagship studies proved that reaching the blood or even brain target does not guarantee a clinical result. Getting the molecule in is necessary - it is not sufficient. That's why this guide grades outcomes, not mechanisms.