26 citations
,
May 2013 in “Marine Drugs” This study found that Ishige sinicola extract increased hair growth and cell proliferation in cultured vibrissa follicles and mice, suggesting potential benefits for treating alopecia through β-catenin activation and 5α-reductase inhibition.
34 citations
,
May 2012 in “International Journal of Molecular Sciences” This study found that Ecklonia cava enzymatic extract, particularly its component dieckol, promoted hair growth by increasing dermal papilla cell proliferation and inhibiting 5α-reductase activity in cultured vibrissa follicles and C57BL/6 mice.
49 citations
,
April 2012 in “Phytotherapy Research” This study found that topical Rosmarinus officinalis leaf extract improved hair regrowth in mice and inhibited androgen-associated mechanisms involved in hair loss.
19 citations
,
September 2011 in “Clinical and Experimental Dermatology” This study suggests that for single biopsy specimens, transverse sections may be preferable for diagnosing noncicatricial alopecia, while vertical sections may be better for suspected lichen planopilaris.
34 citations
,
August 2011 in “Journal of Natural Medicines” This study found that Puerariae Flos extract inhibited testosterone 5α-reductase and promoted hair growth in mouse models, suggesting its potential use for treating androgenic alopecia.
51 citations
,
May 2011 in “Phytotherapy Research” This study suggests that red ginseng rhizome extracts, particularly ginsenoside Ro, may promote hair re-growth in an androgenetic alopecia model due to their inhibitory activity on testosterone 5α-reductase.
151 citations
,
August 2010 in “British Journal of Dermatology” This guideline reviews the diagnosis of androgenetic alopecia and offers expert consensus recommendations tailored to males, females, and adolescents, but reports no new clinical results.
121 citations
,
May 2009 in “Journal of Ethnopharmacology” This study found that the methanol extract of Eclipta alba showed dose-dependent hair growth promoting activity in pigmented C57/BL6 mice by influencing the transition from the telogen to anagen phase.
28 citations
,
January 2009 in “Journal of Cutaneous and Aesthetic Surgery” This article discusses Serenoa repens for androgenetic alopecia and reports no strong evidence of its effectiveness, emphasizing the need for larger clinical trials.
13 citations
,
June 2008 in “Springer eBooks” 
44 citations
,
January 2007 in “Biological & pharmaceutical bulletin” This study found that Piper nigrum leaf extract showed in vivo anti-androgenic activity and potent 5α-reductase inhibitory effects, with piperine and (−)-cubebin identified as active components.
87 citations
,
March 2005 in “Journal of Dermatological Science” This study found that the extract of Asiasari radix may promote hair growth in mice by enhancing protein synthesis, cell proliferation, and growth factor expression.
25 citations
,
July 2004 in “Experimental Dermatology” This study found that water-soluble extracts of Illicium anisatum promoted hair follicle elongation in cultured mouse vibrissae, suggesting potential use in hair growth products.
434 citations
,
October 2003 in “PTR. Phytotherapy research/Phytotherapy research” This review discusses the use of natural products in cosmetic preparations for skin and hair care, but reports no new research results.
128 citations
,
September 2003 in “Journal of Ethnopharmacology” This study found that the petroleum ether extract from the leaves of Hibiscus rosa-sinensis demonstrated more effectiveness in promoting hair growth in rats compared to the extract from its flowers.
59 citations
,
August 2003 in “Phytotherapy Research” This study found that a 70% methanol extract from red ginseng stimulated hair growth in mouse vibrissal follicles, suggesting its bioactive components, particularly certain ginsenosides, may promote hair growth.
47 citations
,
April 2003 in “Journal of dermatological science” This study showed that Thujae occidentalis semen extract inhibited 5alpha-reductase type 2 in laboratory tests and reduced androgen-related hair loss in animal models, suggesting potential use for male pattern baldness.
75 citations
,
October 2002 in “Journal of Dermatological Science” This study found that Sophora flavescens extract may promote hair growth in mice by inducing earlier hair cycle changes and regulating growth factors in dermal papilla cells.
65 citations
,
April 2002 in “Journal of Alternative and Complementary Medicine” This study found that 60% of men with mild to moderate androgenetic alopecia showed improvement after treatment with botanically derived 5AR inhibitors, suggesting these compounds may be effective, though larger trials are needed.
51 citations
,
January 2001 in “Biological & Pharmaceutical Bulletin” This study found that the aqueous ethanol extract of Myricae Cortex demonstrated in vitro testosterone 5alpha-reductase inhibitory activity and in vivo anti-androgenic effects in mouse and hamster models.
