Clinical Evaluation of Lactobarriome 5% Cream's Efficacy on Dry Skin for Improving Skin Hydration and Transepidermal Water Loss, Relieving Pruritus, and Altering the Skin Microbiome

The purpose of this clinical trial is to assess the skin hydration and transepidermal water loss improvement, pruritus relief, and microbiome alteration effects of a Lactobacillus sp. product (Lactobarriome 5% cream) compared to a placebo cream to prove the skin improvement effects of Lactobarriome 5%, which is a nature-friendly material derived from intravaginal microflora that can replace chemical components commonly used as ingredients for existing cosmetics.

The impact of Lactobarriome 5% cream, formulated with LP51 culture filtrate, on dry skin was assessed through a 4-week double-blind clinical trial. Participants were selected based on predefined inclusion and exclusion criteria. Using a simple randomization method, participants were assigned to either the experimental group (receiving the test formulation) or the control group (receiving a placebo). The products were applied twice daily-morning and evening-to a 3 cm area on both the proximal and distal sides of the designated arm's crook. Clinical evaluations were conducted at baseline, as well as after 2 weeks and 4 weeks of product use. These assessments included visual inspections, subjective pruritus evaluations, skin hydration levels, and transepidermal water loss (TEWL) measurements, all performed by a skincare professional. Furthermore, magnified images were captured using a Folliscope, and skin samples were collected to analyze microbial changes post-treatment. Before application, the designated arm was washed with water and allowed to rest for 30 minutes under controlled conditions (22±2°C, 50±10% relative humidity).