Measuring skin carotenoid levels with a new portable Prysm scanner.
Official title: Study on Carotenoid-Based Instrumental Index
Run by ChinaNorm · NCT07198503 · Data updated 2026-11-12
This project will test a new portable Prysm skin scanner in Chinese adults to measure carotenoid levels and see if those levels relate to diet and lifestyle.
Quick facts
| Study type | Observational |
|---|---|
| Ages | 18 Years and up |
| Sex | All |
| Enrollment | 600 (estimated) |
| Sponsor | ChinaNorm Industry-sponsored |
| Locations | 1 site (Shanghai, Shanghai Municipality) |
| Status | Recruiting |
| Started | September 6, 2025 |
| Main results expected | October 16, 2025 |
| Study ends | October 16, 2025 |
| Registry record updated | September 30, 2025 |
| Trial ID | NCT07198503 on ClinicalTrials.gov |
Is this trial a fit for you?
✓Likely a good fit
Chinese adults (18 years or older) of Asian ethnicity who can read and write Chinese, are willing to provide informed consent, and can comply with the assessment procedures are ideal candidates.
✕Probably not a fit
Individuals who are pregnant or breastfeeding, have open facial lesions or significant acne scarring, are undergoing treatment for severe acute illnesses, or have major cognitive or behavioral impairments are unlikely to benefit or qualify for participation.
A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.
What this trial studies
This observational study uses a Prysm biophotonic scanner based on Raman spectroscopy to measure skin carotenoid levels via hand scans in adult Chinese volunteers. Participants provide demographic and lifestyle information and undergo measurements including BMI, body fat percentage, standardized skin imaging (ITA°, L*, a*, b*, glossiness, erythema, pigmentation) and questionnaires on diet, skin condition, physical and psychological health, and memory. No interventions are administered; collected data will be analyzed to determine relationships between skin carotenoid signals and self-reported dietary and lifestyle factors and to validate the portable device in a population sample. Eligibility requires Chinese adults able to complete Chinese-language questionnaires and willing to consent, while those with active facial lesions, pregnancy or breastfeeding, severe acute illness treatment, or significant cognitive impairment are excluded.
Why it matters
Potential benefit: If successful, the Prysm device could offer a low-cost, noninvasive way for people and clinicians to monitor dietary carotenoid status and aspects of skin health.
How similar studies have gone: Other Raman-based commercial skin carotenoid scanners have previously shown correlations with dietary carotenoid intake, and this device adapts that approach into a lower-cost, portable form.
Who can join: the full rules
Show full inclusion / exclusion criteria
Inclusion Criteria: 1. Chinese individuals of Asian ethnicity aged 18 years or older. 2. Basic proficiency in reading and writing Chinese, sufficient to independently complete questionnaires. 3. Voluntary participation with signed informed consent. 4. Willingness to comply with all assessment requirements. Exclusion Criteria: 1. Presence of open facial lesions, prominent scars, or visible acne marks. 2. Currently planning pregnancy, pregnant, or breastfeeding. 3. Ongoing treatment for acute or severe medical conditions. 4. Significant impairments affecting cognitive or behavioral abilities. 5. Other medical reasons identified by experts or professionals that may interfere with the assessment results.
Where it's running
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Shanghai China-norm Quality Technical Service Co., Ltd.
Shanghai, Shanghai Municipality, China Recruiting
How to take part
- Review the eligibility criteria above with your treating physician.
- Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
- Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.