Synopsis

Source of validity: Scientific
Rating (out of 5): 2

Alpha-linolenic acid (ALA) is an omega-3 essential fatty acid found in plant sources such as flaxseed, chia seeds, and walnuts. Its use for supporting dry and/or flaky skin is primarily based on scientific evidence, though the strength of the evidence is moderate rather than robust. ALA is a critical component of cell membranes and is involved in maintaining the integrity and flexibility of the skin barrier. Several studies, including clinical trials and animal research, have demonstrated that deficiencies in essential fatty acids can lead to skin problems, including dryness, scaliness, and impaired barrier function.

Supplementation with ALA or ALA-rich oils has been shown to improve skin hydration and reduce transepidermal water loss in both animal models and some human studies. A 2011 randomized controlled trial found that daily supplementation with flaxseed oil (rich in ALA) for 12 weeks improved skin sensitivity, hydration, and smoothness in healthy women. However, the number of high-quality human trials remains limited, and results are not always consistent. Furthermore, while ALA can contribute to the body’s pool of longer-chain omega-3 fatty acids (EPA and DHA), its conversion rate is low, and some observed benefits may be due to anti-inflammatory effects of ALA itself.

In summary, there is scientific rationale and some clinical evidence supporting the use of ALA for dry and/or flaky skin, though the evidence is not overwhelmingly strong. It is generally considered safe when consumed as part of a balanced diet.

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