Evidence supporting the use of: Fatty acids
For the body system: Hair

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Synopsis

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

Fatty acids, particularly omega-3 and omega-6 polyunsaturated fatty acids, have scientific evidence supporting their role in hair health. Hair follicles require a healthy lipid (fat) environment to function optimally. Several studies have shown that deficiencies in essential fatty acids can result in hair changes, such as hair loss and thinning. For example, research has demonstrated that supplementation with omega-3 and omega-6 fatty acids, sometimes in combination with antioxidants, can improve hair density and decrease hair loss in individuals experiencing thinning hair. A 2015 randomized, placebo-controlled study published in Journal of Cosmetic Dermatology found that six months of supplementation led to significant improvements in hair density and a decrease in telogen (resting phase) hair percentage.

Fatty acids are thought to support the scalp by reducing inflammation and improving circulation, both of which are important for healthy hair growth. Additionally, they contribute to the integrity of the hair shaft and can help prevent hair from becoming dry and brittle. While the evidence is not overwhelming and further research is needed to clarify mechanisms and effectiveness for broader populations, current scientific data suggest that fatty acids do play a supportive role in hair health, particularly in individuals with dietary insufficiencies or certain scalp conditions.

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