This study found that gels containing glycyrrhizic acid and aqueous Glycyrrhiza glabra extract significantly reduced underarm hair growth in terms of area, thickness, length, and number compared to their gel bases.
4 citations
,
October 2017 in “International Journal of Applied Pharmaceutics” This study found that hair tonics with 5% and 10% licorice extract promoted hair growth in rabbits similarly to 2% minoxidil and were generally safe, although they caused mild eye irritation at the 2.5% concentration.
1 citations
,
June 2018 in “Pharmaciana” In this study, researchers developed a hair tonic using 7.5% Aloe vera extract and 2.5% licorice extract, finding that the formula with 15% ethanol showed optimum activity by promoting hair growth and increased hair weight in rabbits over 28 days.
July 2024 in “Journal of Eastern – Western Pharmacology and Pharmacy” This study found that Tribulus terrestris L. extract promoted significant hair growth and reduced skin inflammation in Wistar rats, while Urtica cannabina extract, Glycyrrhiza glabra extract, and Tribulus terrestris L. extract all led to uniform hair growth over 28 days compared to other tested extracts.
September 2017 in “Zenodo (CERN European Organization for Nuclear Research)” This study suggests that a topical hydroalcoholic extract of liquorice root significantly reduced sebaceous gland size in Syrian hamsters, indicating potential for use in anti-acne therapy.