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The effects of the guava leaf extract and standard reference compounds (dutasteride, finasteride, minoxidil, quercetin, gallic acid, and (+)-catechin) at different concentrations (62.50, 31.25, 15.63, and 7.81 μg/mL) on the expression of (a) SRD5A1, (b) SRD5A2, and (c) SRD5A3 in human hair follicle dermal papilla cells (HFDPC). Values not sharing the same superscript letter are significantly different (p < 0.05) when compared between concentrations of each treatment.
