August 2023 in “The Indonesian Biomedical Journal” This study on UVB-exposed mice found that topical application of 10% Rosmarinus officinalis essential oil significantly increased hair length and follicle diameter, attributed potentially to its antioxidant compounds.
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May 2001 in “PubMed” This study proposes a new clinical scoring method for hair density based on hair diameter diversity, which correlates with existing measures and reflects follicle miniaturization in androgenetic alopecia.
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April 2021 in “Clinical, Cosmetic and Investigational Dermatology” This review proposes that inconsistent findings in androgenic alopecia research are due to variable biopsy location, hair diameter diversity, and hair follicle miniaturization, and suggests ways to improve study methods.
January 2023 in “International journal of research publications” According to this study, rice bran oil was as effective as 2% minoxidil in improving hair growth parameters, such as VEGF expression, follicle diameter, and hair length, in Wistar rats treated for 21 days, showing potential for preventing hair thinning associated with aging.
In this randomized, controlled trial, the researchers observed that sub-lingual minoxidil at doses of 1.35 mg and 4.05 mg, but not 0.45 mg, significantly increased hair fibre diameter in men with male androgenetic alopecia over 24 weeks, suggesting a dose-dependent reversal of follicle miniaturization.