How the Liver Controls Omega-3 Levels Differently in Male and Female Mouse Hearts
This animal study looked at a liver enzyme called ELOVL2, which helps the body build long-chain omega-3 fats like DHA from shorter omega-3s such as EPA. Scientists know that young female mice (and humans) tend to have higher DHA levels than males, and they wanted to find out whether this liver enzyme is behind that difference.
Researchers created mice that had this enzyme switched off only in the liver, then compared them to normal mice. Using a special feeding and tracking method, they measured how quickly omega-3 fats were built, moved through the body, and broken down in the liver, blood, and heart over about four months.
They found that turning off liver ELOVL2 changed how long an omega-3 building-block fat (DPA) stuck around in the liver and blood, but only in females. In the heart, DHA lingered longer in males without the liver enzyme, and the normal male-female difference in how fast DHA is used up disappeared once the enzyme was removed. The liver enzyme also affected activity of another fat-processing gene, Fads1.
What this means for you
This early-stage animal research suggests that the liver plays a key role in creating natural sex differences in omega-3 metabolism, particularly for heart tissue DHA. It’s a mechanistic mouse study, not a human trial, so it doesn’t tell us anything about supplement dosing or outcomes in people—but it helps explain why omega-3 levels and needs may differ between men and women.
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The Journal of nutritional biochemistry · 2026-09-23 · DOI: 10.1016/j.jnutbio.2026.110511
Read the original source ↗This summary is for educational purposes only and is not medical advice. Always talk to your healthcare provider before making changes to your supplement routine.