Revisiting In Vivo the Hair Regreasing Process by the Sebuprint Method

The study revisited the hair regreasing process using the Sebuprint method, involving 123 Chinese men aged 18-35, and found that greasy scalp subjects had approximately twice the sebum spread compared to nongreasy subjects, despite similar sebum levels at the root 48 hours post-shampoo. The method showed reproducibility and revealed a linear progression of sebum spread over time. Additionally, sebum collection location had minimal impact at 24 hours but significant differences at 48 hours. The findings underscored the importance of understanding sebum production for developing better hair care products and treatments, suggesting that ingredients reducing sebum spread rate could help manage greasy hair.