Evaluation of hydration and unctuousness of skin in female volunteers of Ras sara- asara using non-invasive objective method: A cross sectional analytical study

Abstract

Background: Ayurveda classifies individuals based on Dhatu Sarata, where Rasa Sarata (superior quality of Rasa Dhatu) is associated with better skin hydration and unctuousness. However, objective scientific validation of this concept remains limited. This study aimed to evaluate skin hydration and unctuousness in female volunteers as Rasa Sarata and Rasa Asarata by using a non-invasive digital moisture meter. Methods: A cross-sectional analytical study was conducted on 82 healthy female volunteers aged 20–28 years, categorized into Rasa Sarata (n=41) and Rasa Asarata (n=41) groups based on standard Ayurvedic parameters. Skin hydration and oil levels were measured at five anatomical sites (face, forehead, arm, opisthenar, and ocular region) using the SK-IV Digital Moisture Meter. Data were analyzed using the Mann-Whitney test to compare hydration and unctuousness between the groups. Results: Rasa Sarata individuals exhibited significantly higher hydration and oil levels across all measured sites compared to Rasa Asarata individuals (p < 0.05). Regional variations were observed, with the highest hydration and unctuousness levels in the facial and ocular regions. Conclusion: This study provides scientific validation for Ayurvedic Rasa Sarata and Rasa Asarata classifications by demonstrating measurable differences in skin hydration and unctuousness. The findings highlight potential applications in personalized skincare, integrating Ayurvedic diagnostics with modern bioengineering tools for dermatological and cosmetic advancements. Further research incorporating biochemical markers and Ayurvedic interventions can enhance our understanding of Rasa Dhatu’s role in skin physiology.