Synopsis

Source of validity: Scientific
Rating (out of 5): 3

Omega-6 fatty acids, particularly linoleic acid, have a scientific basis for their role in supporting hair health. Linoleic acid is an essential fatty acid that is a key component of cell membranes and contributes to skin and hair barrier function. Deficiency in omega-6 fatty acids has been associated with hair loss and scalp dermatitis in both animal and human studies. For example, individuals with essential fatty acid deficiency often exhibit hair depigmentation, dryness, and increased hair shedding, which can be reversed by supplementation with omega-6-containing oils such as safflower or sunflower oil.

Some clinical studies suggest that topical or oral supplementation of omega-6 fatty acids, sometimes in combination with omega-3, can improve hair density and reduce hair loss, especially in people with telogen effluvium or androgenetic alopecia. The proposed mechanism involves improving follicle health through anti-inflammatory effects and by supporting the integrity of the scalp's barrier function. However, evidence is not uniformly strong; many studies are small, short-term, or combine omega-6 with other nutrients, making it difficult to isolate their specific effects.

Overall, while omega-6 fatty acids are essential for healthy hair and scalp, and deficiency can cause hair problems, there is moderate scientific support (but not robust clinical trial evidence) for their use in supporting hair health in otherwise healthy individuals.

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