Purpose: The hair losing population is increasing due to stress, environmental pollution, and various cosmetic procedures, and the market for functional cosmetics for scalp and hair care is further growing due to the lower aging population. Recently, however, many studies have been conducted where many are found to seek cosmetic raw materials from natural substances or apply fermentation techniques to cosmetic manufacturing processes. Hence, after fermenting with Sasa Borealis, which is edible and has been used for various pharmacological func-tions in the private sector for a long time and has secured clinical safety, the effectiveness(in vitro) has been investigated, and the fermented mixture of natural products is used as a sample for damaged hair, and the re-covery effect has been examined and understood. Method: Examined in this study were the antibacterial activity, anti-inflammatory activity, and dermal papilla cell proliferation rate of Sasa Borealis leaf fermented product, which were mixed with the green coffee bean and Smilax china L. leaf fermented product, and after selecting the fermented mixed sample, the added scalp hair care product was treated with heat perm and dyeing to measure tensile strength and glossiness, where the re-covery effect of damaged hair was investigated by imaging with SEM. Results: Sasa Borealis leaf ferment was superior to M. canis, anti-inflammatory activity and dermal papilla cell proliferation. The product to which the fermentation mixture sample was added increased both the tensile strength and glossiness of the hair damaged by heat perm and dyeing, and as a result of confirming such via the SEM, it was found that there is an effect of restoring the damaged hair. Conclusion: Sasa Borealis leaf fermented product has excellent M. canis, anti-inflammatory ability, and der-mal papilla cell proliferation rate, and hence, it was confirmed that it may be applied as a raw material for various cosmetics. The cosmetics containing natural fermentation mixtures increased tensile strength and glossiness of damaged hair. Future research is expected to articulate the pharmacological mechanism of the fermentation mixture through the physiological studies related to the fermentation process and the growth rate of dermal papilla cells.
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