Lactobacillus is one of the friendly bacterias that belongs to Lactobacillaceae. It is a group of different species of lactobacillus such as L. acidophilus, L. brevis, L. casei and L. sanfranciscensis etc. These "friendly" bacterias are known for giving positive effects on our body and normally exist in a number of our organs such as the genital system or digestive system. Through the fermentation of lactobacillus, the lactic acid is produced as a byproduct. The lactic acid is widely used in the food industry to impede the growth of harmful bacterias Historically, the ancestors used to use this acid to make their traditional foods such as kimchi and yogurts. Consequently, it was helpful for their longevity. Also, it is known that lactobacillus ferment eliminates the layer of dead skin cells and reinforces the epidermis barrier function. It is also known that it has anti-aging and moisturizing properties on skin. GNS found anti-wrinkle and skin brightening efficacies through in vitro test.