美容学とトリコロジーのジャーナル

Due of skin damage from their jobs, hairdressers are a high-risk category for occupational skin illnesses. Therefore, hand dermatitis is the most common OSD. Hairdressers had a pooled lifetime incidence of HE of 38.2 percent and a 1-year prevalence of 20.3 percent, according to a recent systematic review and metaanalysis of published material from 2000–2021. The most important variables in the development of HE in this occupational field are wet work and skin contact with irritants and allergens. Numerous primary components in numerous hair cosmetics are serious allergies. The likelihood of getting occupational contact dermatitis increases due to the loss of the epidermal barrier function caused by the typical work practises of hairdressers and the emergence of an inflammatory environment.

Alopecia areata (AA), despite strong evidence showing its detrimental impact on quality of life (QoL), is frequently viewed by both doctors and insurance as a cosmetic issue. The Cumulative Life Course Impairment (CLCI) concept tries to define the cumulative consequences of sickness that prevent certain individuals from realising their "full life potential." It can help doctors identify high-risk individuals to encourage early intervention and increase access to therapy as an alternative to longitudinal data.

Background: Alopecia affects both males and females and can cause significant psychological distress. Ageratum conyzoides, traditionally used to treat a multitude of conditions including skin disorders, gastrointestinal problems, headache and pneumonia, has been also found to have good efficacy in increasing hair growth and decreasing hair loss. Importantly, its good safety profile makes it advantageous over the current drug treatments for hair loss; Finasteride and Minoxidil, both of which are associated with adverse effects.

Objective: A 12-week double-blind, randomised, clinical trial investigated the efficacy and safety of a topical application of A. conyzoides in males and females over 18 years of age.

Methods: A. conyzoides topical gel of 0.5% strength was administered daily for 12 weeks to 80 otherwise healthy males and females over 18 years of age who self-reported hair loss. Hair growth was assessed by measuring hair density using HairCheck® and calculating the Hair Loss Ratio (HLR). Hair loss was assessed by the mean number of hairs lost during a one-minute combing test and a hair tugs or pull test. Other hair measures included the Hamilton-Norwood scale for men and Savin scale for women. Participants' quality of life was evaluated by self-assessment questionnaires. Biochemical and haematological parameters were also assessed.

Results: Our study found a significant increase in hair density and significant decrease in HLR following topical application of A. conyzoides. At 12 weeks, hair density in the A. conyzoides treated group was significantly higher and HLR was significantly lower than the placebo group. No significant changes were found in the one-minute combing test or hair pull test or assessment by the Hamilton-Norwood and Savin hair loss scales. Quality of life measures and biochemical and haematological parameters showed no significant changes throughout the study.

Conclusion: The results from our study demonstrate a net increase in hair growth following topical application of A. conyzoides.