Omega-3: Not Quite a Superfood, But the Closest Thing to One

If any single nutrient comes close to earning the overused label of ‘superfood’, it is not some rare Amazonian herb or obscure fungus. It is omega-3 fatty acids — ubiquitous, unglamorous, and chronically under-consumed by the modern world.

Omega-3s are the building blocks of every cell wall in the body. They have a documented role in mental health, heart health, eye health, skin health, sexual and reproductive health, and more. And yet most people do not come close to consuming enough of them.

Omega-3 and Mental Health

Multiple studies and a growing body of clinical experience show that omega-3 fatty acids play a meaningful role in managing depression. Patients who supplement with omega-3 — particularly EPA-dominant formulations — have been observed to respond better to antidepressant medications. Omega-3s also show a distinct role in postpartum depression and perimenopausal depression, and related physical symptoms.

Omega-3 and Sexual Health

Omega-3 fatty acids are integral components of the hormonal systems that govern sexual health. They contribute to the biological pathways through which oestrogen and testosterone are synthesised and regulated — maintaining the intricate balance of hormonal feedback loops that govern libido, sexual function, and reproductive wellbeing.

Omega-3s can help reduce vaginal dryness and discomfort during intercourse. They may also reduce susceptibility to bacterial and fungal vaginal infections through their anti-inflammatory effects on mucosal tissues.

Important nuance: the evidence for sexual health benefits is mechanistic and indirect. Claims should be framed as ‘evidence suggests’ rather than established clinical fact.

Omega-3 and Reproductive Health

Omega-3 supplementation has been associated with increased likelihood of conception. Multiple studies have shown benefits for both natural conception and IVF outcomes:

• Human Reproduction, 2022: omega-3 supplementation associated with increased probability of natural conception
• American Journal of Clinical Nutrition, 2025: higher omega-3 intake linked to increased fecundability and reduced subfertility in women
• EJOG, 2022: omega-3 intake associated with improved embryo quality and better ART (assisted reproductive technology) outcomes

The degree of benefit varies across studies. But the answer to whether omega-3s support fertility is a consistent yes.

The Building Block That Makes Everything Else Possible

Every cell in the body is enclosed by a membrane that contains omega-3 fatty acids. These fats determine how well that membrane functions — how effectively it regulates what enters and exits, how resilient it is to damage, and how well it supports the cell’s communication with surrounding tissues.

When omega-3 intake is insufficient, other fatty acids substitute — but they are inferior substitutes. The result is cell membranes that are less flexible, less resilient, and less able to carry out their functions. This manifests across the body: in the brain, the heart, the eye, the skin, and the reproductive system.

The Practical Bottom Line

Omega-3 fatty acids are not a miracle cure — and promising them as one does a disservice to the genuine, robust evidence that supports them. What they are is one of the most broadly important and consistently evidence-supported nutritional interventions available. Chronically underconsumed. Easily supplemented. Worth prioritising.

References

• Harvard Health. Omega-3 fatty acids for mood disorders. 2020.
• MDPI. Omega-3 PUFAs in depression. 2024.
• Human Reproduction. Omega-3 and fecundability. 2022.
• AJCN. Omega-3 intake, food sources, and fertility in females and males. 2025.

EJOG. Omega-3 for oocyte quality in ART: systematic review. 2022.