Study on Carotenoid-Based Instrumental Index

Nu Skin (China) Daily-Use\&Health Products Co.,Ltd. has developed biophotonic scanners based on Raman spectroscopy, which measures skin carotenoid levels through hand skin scanning. In this study, the new Prysm device, which adopts new technology in a lower cost and more portable form, was used to measure skin carotenoid levels in a population, and the relationships between these levels and dietary habits and lifestyle factors were analyzed. The collected data included basic demographic information such as age, gender, smoking status, use of health products or nutritional supplements, and exercise habits, as well as physiological indicators such as BMI and body fat percentage. Subjective assessments were also obtained, including questionnaires on diet, skin condition, physical health, lifestyle, psychological status, and memory performance, alongside skin image analyses capturing parameters such as ITA°, L\*, a\*, b\*, glossiness, erythema, and pigmentation.

NCT Number	NCT07198503
Lead Sponsor	ChinaNorm Collaborators: Nu Skin Enterprises
Conditions	Skin Carotenoid Status
Enrollment	600 participants
Start Date	2025-09-06
Primary Completion	2025-10-16 (estimated)
Study Completion	2025-10-16 (estimated)
Updated on ClinicalTrials.gov	2025-09-30