Creative Touch Permanent Makeup and Aesthetics

EPA is the omega-3 fatty acid most directly relevant to skin inflammation. Where DHA’s primary role is structural – maintaining membrane fluidity and receptor mobility – EPA’s role is eicosanoid-competitive: it occupies the same membrane phospholipid positions as arachidonic acid (AA) and presents itself as an alternative substrate to cyclooxygenase (COX) and lipoxygenase (LOX), the enzymes that would otherwise convert AA to pro-inflammatory PGE₂ and LTB₄.

A 2019 lipidomics study separating EPA and DHA supplementation found EPA significantly superior to DHA at reducing AA-derived mediators specifically in epidermal phospholipids – elevating PGE₃, 12-HEPE, and EPEA as markers of a shifted, less inflammatory mediator profile. DHA did not produce the same epidermal shift. ^[1] This distinction matters for supplement selection: products providing DHA alone – some algae-derived omega-3 formulations – deliver less of the eicosanoid-competitive benefit relevant to inflammatory skin conditions.

EPA is also the precursor to E-series resolvins (RvE1, RvE2) – specialised pro-resolving mediators that actively terminate inflammation rather than simply competing with its amplification. This resolvin synthesis pathway is absent from the omega-6 arachidonic acid cascade entirely.

Dietary sources: oily fish (salmon, mackerel, sardines, herring), fish oil supplements, and combined EPA+DHA algae-derived supplements. ALA from plant sources converts to EPA at approximately 5–10% efficiency in healthy adults; insufficient to meaningfully shift membrane phospholipid composition.