Study on Carotenoid-Based Instrumental Index
For patients and families
In plain language
An automatic summary of structured registry data. It is an orientation aid, not a substitute for the official protocol or a physician assessment.
- What is being studied
- This is an observational study: the protocol does not assign a study treatment.
- Who it may be relevant to
- Registry conditions: Skin Carotenoid Status. Basic parameters: from 18 years · All.
- What needs checking
- Age, condition and sex are only basic indicators. Prior treatment, laboratory values and other mandatory requirements appear in the eligibility criteria below.
- Where it takes place
- China
- Next step
- Save the trial, show it to the treating physician, and confirm current recruitment with the study center. Costs, documents and travel →
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Overview
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.
Primary outcome measures
- Skin Carotenoid Index [Time frame: At a single Day 1 visit after enrollment]
- Body Mass Index (BMI) [Time frame: At a single Day 1 visit after enrollment]
- Body Fat Percentage (BF%) [Time frame: At a single Day 1 visit after enrollment]
- Demographic Information [Time frame: At a single Day 1 visit after enrollment]
- Dietary Intake [Time frame: At a single Day 1 visit after enrollment]
- Fitzpatrick Skin Type [Time frame: At a single Day 1 visit after enrollment]
- Skin Condition Self-Assessment [Time frame: At a single Day 1 visit after enrollment]
- The score of 36-Item Short Form Survey (SF-36) [Time frame: At a single Day 1 visit after enrollment]
- Frequency of Physical Illness Symptoms [Time frame: At a single Day 1 visit after enrollment]
- Gastrointestinal Discomfort Symptoms [Time frame: At a single Day 1 visit after enrollment]
Eligibility criteria
Inclusion criteria
- Chinese individuals of Asian ethnicity aged 18 years or older.
- Basic proficiency in reading and writing Chinese, sufficient to independently complete questionnaires.
- Voluntary participation with signed informed consent.
- Willingness to comply with all assessment requirements.
Exclusion criteria
- Presence of open facial lesions, prominent scars, or visible acne marks.
- Currently planning pregnancy, pregnant, or breastfeeding.
- Ongoing treatment for acute or severe medical conditions.
- Significant impairments affecting cognitive or behavioral abilities.
- Other medical reasons identified by experts or professionals that may interfere with the assessment results.
Criteria are shown verbatim from the registry (in English). Final eligibility is always assessed by the study center.
Healthy volunteers: Yes
Study design
- Observational model
- Case-only
Study locations
China · 1 center
- Shanghai China-norm Quality Technical Service Co., Ltd. — Shanghai
Identifiers
NCT: NCT07198503 · W25002001