Synopsis

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

Fruit acids, commonly referred to as alpha hydroxy acids (AHAs) such as glycolic acid, lactic acid, and citric acid, are frequently used in dermatology and cosmetic procedures to improve the appearance of scars and scar tissue. There is moderate scientific evidence supporting their use, primarily due to their exfoliating properties which promote cell turnover and stimulate collagen production. Several clinical studies have shown that regular application of AHAs can help in the management of post-acne scars, hyperpigmentation, and uneven skin texture. For example, glycolic acid peels (20-70%) have demonstrated improvement in atrophic (depressed) acne scars and post-inflammatory hyperpigmentation by inducing epidermal remodeling and helping to fade discoloration. However, their effect on mature or hypertrophic (raised) scars is limited, as these typically require more intensive treatments such as laser therapy or corticosteroids. While fruit acids are not a cure for scars, they are often recommended as adjunctive treatments to enhance the results of other procedures or as a non-invasive method to improve superficial textural irregularities. The evidence is strongest for mild-to-moderate acne scars and pigmentary changes, but weaker for deep or thickened scars. Overall, the use of fruit acids for scar improvement is supported by peer-reviewed studies and clinical practice, though results may vary and should be managed with realistic expectations.

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