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Toxicol Res. 2014 Dec;30(4):297-304. doi: 10.5487/TR.2014.30.4.297.

Peppermint Oil Promotes Hair Growth without Toxic Signs.

Author information

1
Department of Beauty, Daeduk College, Daejeon, Korea.
2
Department of Public Health, Keimyung University, Daegu, Korea.

Abstract

Peppermint (Mentha piperita) is a plant native to Europe and has been widely used as a carminative and gastric stimulant worldwide. This plant also has been used in cosmetic formulations as a fragrance component and skin conditioning agent. This study investigated the effect of peppermint oil on hair growth in C57BL/6 mice. The animals were randomized into 4 groups based on different topical applications: saline (SA), jojoba oil (JO), 3% minoxidil (MXD), and 3% peppermint oil (PEO). The hair growth effects of the 4-week topical applications were evaluated in terms of hair growth, histological analysis, enzymatic activity of alkaline phosphatase (ALP), and gene expression of insulin-like growth factor-1 (IGF-1), known bio-markers for the enhanced hair growth. Of the 4 experimental groups, PEO group showed the most prominent hair growth effects; a significant increase in dermal thickness, follicle number, and follicle depth. ALP activity and IGF-1 expression also significantly increased in PEO group. Body weight gain and food efficiency were not significantly different between groups. These results suggest that PEO induces a rapid anagen stage and could be used for a practical agent for hair growth without change of body weight gain and food efficiency.

KEYWORDS:

Alkaline phosphatase; Hair follicle; Hair growth; Insulin-like growth factor-1; Peppermint oil

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