Omega-3 fatty acids
For pregnancy nutrition
The experts we follow agree on this.

Omega-3s are a well-supported choice for brain, metabolic, and mitochondrial health.
Who is behind it
Voices including a nutritional sciences PhD, a board-certified cardiologist and an Oxford metabolism PhD.
How strong the research is
Backed by some published research, and by what the experts see in practice.
In their words
“omega-3s are extremely important ... seafood is very rich in dha very rich in electrons that helps electrons help with the mitochondrial function”
a board-certified cardiologist
The expert clarifies that people should still eat fish or get omega-3 fatty acids despite concerns about long-term supplementation.
Omega-3s have been shown to raise HDL concentrations.
Omega-3 fatty acids are the most important supplement for the brain because many people are deficient.
Omega-3 fatty acids improve cell membrane fluidity and protect against oxidative damage by producing anti-inflammatory prostaglandins and eicosanoids.
With care
Some of the minds attach conditions. These are worth reading before you begin.
The expert describes an observed effect of megadosing omega-3s from sardines on cold tolerance without explicit recommendation.
Omega 3s are inherently unstable, often removed first from membranes for metabolism, and may interact poorly with lipid raft domains causing altered protein aggregation linked to Parkinson's and dementia.
Polyunsaturated fats increase thyroid hormone notably T4 but may disrupt thyroid hormone transport and conversion.
Where they disagree
Both sides
For
The expert clarifies that people should still eat fish or get omega-3 fatty acids despite concerns about long-term supplementation.
a nutritional sciences PhDAgainst
Keith Littlewood warns that omega-3 fatty acids damage your body.
an endocrinology-trained performance coachMost of the minds come down in favour, and the dissent is worth knowing.
Talk it through
Entrain shows what the experts teach, so you can make better decisions with your own clinician. It does not diagnose or prescribe. If something is worrying you, start there.
How this reading was made
Every line here comes from a doctor, scientist or coach speaking publicly, and links to the moment they said it. Entrain listens for where independent experts arrive at the same place on their own, and shows where they part ways. Backed by some published research, and by what the experts see in practice.
None of the statements here come with a declared commercial interest. Last refreshed 23 September 2026.
The research beneath it
- The Effect of Omega-3 Fatty Acids on Rheumatoid Arthritis.Mediterranean journal of rheumatology, 2020





