Omega-3 fatty acids — found in oily fish, flaxseed, and fish oil supplements — are widely marketed for their cardiovascular and inflammatory benefits, and increasingly appear in hair health supplement formulations. Understanding what the evidence shows for hair specifically helps patients make informed decisions.
The theoretical basis for omega-3 and hair health centres on their anti-inflammatory properties. Chronic low-grade scalp inflammation is thought to contribute to androgenetic hair loss by exacerbating the follicle miniaturisation process. Reducing this inflammation through dietary means or supplementation may provide a modest protective effect.
A small number of clinical studies have shown improvements in hair density and reduced shedding with omega-3 and omega-6 supplementation in women with diffuse hair loss. The results are modestly positive but limited by small sample sizes and short follow-up periods.
Omega-3 supplements are safe for most people and have multiple health benefits beyond hair. At standard doses (1,000 to 2,000 mg of combined EPA and DHA daily), the main consideration for hair transplant patients is their mild blood-thinning effect — pause them two weeks before any surgical procedure.
As with most nutritional supplements for hair health, omega-3 is best viewed as a complement to evidence-based primary treatments rather than a substitute. Combined with finasteride or minoxidil, a diet rich in anti-inflammatory foods and adequate omega-3 may provide a marginal additive benefit.
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