A total of 120 Chinese male subjects aged 18-50 years who have undergone hair transplantation are planned to be enrolled in this study. Among them, 90 participants with mild-to-moderate scalp seborrheic dermatitis (hereinafter abbreviated as SD) will be stratified and randomly allocated into two groups based on a randomization table with stratification factors including SD severity grading, alopecia classification and age. Subjects in the test product group (hereinafter referred to as the holistic group) will use the test shampoo plus basic shampoo, while those in the basic control group will receive only basic shampoo. The remaining 30 non-SD subjects will constitute the non-SD control group and use basic shampoo alone. 1. Primary Objective To compare pre- and post-treatment changes in clinical, physiological, biological and microecological parameters related to SD manifestations, scalp health and skin barrier repair (including transepidermal water loss, scalp hydration, scalp sebum content, etc.) between the holistic group receiving the investigational shampoo regimen and the basic control group via non-invasive instrumental measurement, clinical assessment, clinical photography and subject self-evaluation. The safety and efficacy of the test product in improving scalp condition and skin barrier function will be evaluated, and its potential underlying mechanisms will be explored. 2. Secondary Objective To investigate the impacts of the test product versus the control shampoo on hair transplant-associated complications (e.g., folliculitis), wound healing, follicular shedding phase, graft survival rate and hair growth parameters among SD patients. 3. Exploratory Objective To collect baseline clinical, physiological, biological and scalp microecological data from non-SD recipients after hair transplantation for reference purposes.
Age range
18 Years – 55 Years
Sex
MALE
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Scalp Seborrheic Dermatitis Assessment
Timeframe: 14 days before enrollment, the day of enrollment, and 7 days, 28 days, 3 months, 6 months, and 9 months after enrollment.
Alopecia Grade Assessment
Timeframe: 14 days before enrollment, and 28 days, 3 months, 6 months, and 9 months after enrollment.
Scalp sebum content measurement using Sebumeter
Timeframe: 14 days before enrollment, the day of enrollment, 7 days, 28 days, 3 months, 6 months, and 9 months after enrollment
Scalp stratum corneum moisture content measurement using Dermalab
Timeframe: 14 days before enrollment, the day of enrollment, 7 days, 28 days, 3 months, 6 months, and 9 months after enrollment
Transepidermal Water Loss (TEWL) measurement using Vapometer
Timeframe: 14 days before enrollment, the day of enrollment, 7 days, 28 days, 3 months, 6 months and 9 months after enrollment