TLDR Herbal extracts can help hair regrowth and may treat hair loss.
The study investigated the effects of herbal extracts on hair regrowth in C3H/HeJ mice, with 6 experimental groups including controls and 3 herbal mixtures (C, D, E). The E mixture, containing Swertia pseudo-chinensis, Sophora flavescens, Scutellaria baicalensis, and Salvia miltiorrhiza, showed the most significant results, accelerating hair regrowth faster than controls and increasing enzyme activities (ALP and γ-glutamyl transpeptidase) and growth factors (EGF and VEGF) after 3 weeks. These findings suggested that herbal extracts could be effective for treating alopecia in humans.
2 citations
,
November 2019 in “PubMed” 
3 citations
,
November 2019 in “DOAJ (DOAJ: Directory of Open Access Journals)” Pumpkin seed oil may help hair grow and could be an alternative treatment for male hair loss.
1 citations
,
August 2017 in “Journal of food and nutrition research” The herbal supplement increased hair thickness and reduced scalp oiliness in women.
30 citations
,
December 2014 in “Toxicological Research” Peppermint oil can effectively promote hair growth without being toxic.
1 citations
,
November 2013 in “Asian Journal of Pharmaceutical and Clinical Research” Medicated oil from Martynia annua leaves and fruits helps prevent hair loss caused by testosterone in mice.
7 citations
,
February 2013 in “Tropical Journal of Pharmaceutical Research” Licorice root extract may promote hair growth in female rats.
4 citations
,
June 2011 in “Journal of Biomedical Research” Herbal extracts promoted hair growth similar to minoxidil in mice.
March 2009 in “Journal of Biomedical Research” Herbal extract mixtures may speed up hair growth and could help treat baldness.
98 citations
,
May 2008 in “Archives of Dermatological Research” Eclipta alba extract helps hair grow faster and more effectively than minoxidil in rats.