Skin carotenoid levels and immune aging

Is this trial a fit for you?

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 will measure skin carotenoid content noninvasively and compare those levels with a range of immune-related health parameters in two age groups (18–30 and 65+). Eligible participants are healthy adults of all Fitzpatrick skin types who are not taking immune-altering prescription medications and do not have interfering skin disease on the upper extremity. The protocol excludes pregnant or breastfeeding people and those with uncontrolled medical conditions. Participants will attend the Stanford Health General Dermatology Clinic in Redwood City for measurements and specimen collection as specified by the study team.

Why it matters

Who can join: the full rules

Inclusion Criteria:

* Willing and able to provide written informed consent
* Age 18-30 years OR 65 years and older
* Healthy individuals without uncontrolled medical conditions (over the counter inhaled and topical steroids allowed)
* Fiitzpatrick I-VI (all skin types)

Exclusion Criteria:

* Pregnant or breastfeeding
* uncontrolled medical conditions
* Skin conditions on the upper extremity that would interfere with skin measurements of carotenoid levels such as active atopic dermatitis or psoriasis
* Concurrent use of medications that affect the immune system, within 4 weeks of enrollment (eg. prednisone, biologics, methotrexate, rapamycin, prescription topical steroids, prescription inhaled steroids, others)
* Unable to follow study protocol

Where it's running

• Stanford Health - General Dermatology Clinic
  Redwood City, California, United States Recruiting

Study contacts

• Study coordinator: Xiaochen Zhong, BA
• Email: xczhong@stanford.edu
• Phone: 408-816-0111

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How to take part

1. Review the eligibility criteria above with your treating physician.
2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.