Development and Clinical Efficacy Evaluation of Facial Toner Containing <i>Houttuynia cordata</i> Thunb

Abstract

The goal of this research was to develop a reliable oil-controlling toner for facial skin with a natural product, Houttuynia cordata Thunb extract (HCE). The developed HCE facial toner showed high stability and had a high satisfaction level. Clinical studies revealed that the sebum value of the skin after using the developed HCE toner for eight weeks decreased (4.6-times lower), which was statistically significant (p-value p-value < 0.05) from the eighth week of treatment compared to the HCE-free toner and was 1.5- and 1.4-times higher for the left and right cheeks, respectively. The average moisture content of the facial skin treated with the HCE toner increased by 2- and 1.4-times compared to the treatment with the HCE-free toner for the left and right cheeks, respectively. Consequently, the HCE toner had anti-sebum and moisturizing efficacy, and the increased reliability of the natural product meant that it could soon be a premium commercial product.

Keywords

• <i>Houttuynia cordata</i> Thunb
• clinical studies
• anti-sebum
• moisturizing