Reply to: The Use of Low-Level Light for Hair Growth: Part I

    Leonard Stillman
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    TLDR The letter criticizes a study's methods and small size, suggesting larger, better-designed research would show low-level light therapy effectively grows hair.
    In a letter responding to a study by Avram and Rogers, Leonard Stillman of Lexington International, LLC, critiques the methodology and sample size of the referenced study on low-level laser therapy (LLLT) for hair growth. The Avram and Rogers study involved seven patients and did not find a statistically significant increase in terminal hair counts. Stillman suggests that a double-blind study with a larger cohort would yield different results. He points to a study by Leavitt et al., which involved a larger sample size and a double-blind, sham-device-controlled methodology, and reported significant positive results for hair growth in male patients with androgenetic alopecia. Stillman argues that if Avram and Rogers had conducted a larger, longer-term study, they would have observed similar positive outcomes, and he asserts that future well-designed studies will confirm the efficacy of LLLT as a first-line treatment for male androgenetic alopecia.
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