{"type":"trials","record":{"id":21694,"source_id":"clinicaltrials-gov","external_id":"NCT07221643","title":"Carotenoids in the Skin and Immune Aging","brief_summary":"This study aims to examine the connection between the level of carotenoids in the skin and a number of immune related health parameters.","overall_status":"Recruiting","phases":[],"study_type":"OBSERVATIONAL","sponsor":"Stanford University","enrollment":40,"countries":["United States"],"start_date":"2025-10-09","completion_date":"2026-04-01","last_update_date":"2025-12-15","source_url":"https://clinicaltrials.gov/study/NCT07221643","editorial_summary":"A registered study indexed because it matched monitored longevity research terms. Registry status: Recruiting. Registration does not establish safety or effectiveness.","first_seen_at":"2026-09-24T01:17:08.972024+00:00","last_seen_at":"2026-09-25T06:20:14.553+00:00","metadata":{"sex":"ALL","acronym":null,"age_range":"18 Years","comparator":null,"organization":"Stanford University","interventions":[],"registry_source":"ClinicalTrials.gov","outcome_measures":["Skin carotenoid levels and skin aging features — one day","Skin carotenoid levels and biomarkers of aging — one day","Skin carotenoid levels and self-reported perception of health — 2 weeks"],"design_description":null,"source_has_results":false},"controlled_terms":["No Condition","Skin Carotenoids and Immune-aging"],"relevance_confidence":80,"source_quality_score":100,"freshness_score":85,"publication_state":"published","match_explanation":"Title contains controlled term: immune aging.","quality_checked_at":"2026-09-25T06:20:17.523592+00:00","duplicate_cluster_key":"id:nct07221643","duplicate_of_id":null,"evidence_snapshot":{"status":"structured","version":1,"duration":"2025-10-09 to 2026-04-01","comparator":null,"confidence":"structured-source","population":"ALL · 18 Years","provenance":{"duration":"start_date and completion_date","comparator":"registry arm fields","population":"registry eligibility fields","intervention":"registry intervention fields","participants":"enrollment","study_design":"study_type and registry design fields","evidence_stage":"phases","reported_outcome":"not available","outcomes_measured":"registry outcome-measure fields"},"generated_at":"2026-09-25T06:20:14.569Z","intervention":[],"participants":40,"study_design":"OBSERVATIONAL","subject_scope":"Human clinical study registration","evidence_stage":"Phase not reported","safety_context":"Eligibility, adverse-event details, and clinical decisions must be checked in the official registry and with qualified clinicians.","source_support":"Structured registry protocol metadata; no finding-level conclusion is generated.","main_limitation":"This is a study registration. No reusable structured result is available here, so it cannot show whether the intervention worked or was safe.","reported_outcome":null,"outcomes_measured":["Skin carotenoid levels and skin aging features — one day","Skin carotenoid levels and biomarkers of aging — one day","Skin carotenoid levels and self-reported perception of health — 2 weeks"],"regulatory_context":"Trial registration is not regulatory approval and does not establish that an intervention is available."},"clinical_trial_topics":[{"topic_slug":"immune-aging","is_published":true,"match_reasons":["Title contains controlled term: immune aging.","Title supplies longevity context: aging.","Study type is explicitly identified as OBSERVATIONAL."],"matched_fields":["title","title context","study type"],"relevance_score":80,"intelligence_topics":{"name":"Immune ageing","slug":"immune-aging"}}],"content_sources":{"name":"ClinicalTrials.gov","homepage_url":"https://clinicaltrials.gov/"}},"canonical_url":"https://www.immortal.life/trials/21694","automation_disclosure":"Generated automatically from cited source metadata. No scientist, clinician, researcher, editor, or human reviewer evaluates this publication before release."}