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Skin odor signatures may shift with age
Investigators linked distinct odor patterns to life stage, sex, and skin microbes, while limited longitudinal evidence leaves their clinical utility uncertain.
Clinical Scorecard: Skin odor signatures may shift with age
At a Glance
Category
Detail
Condition
Clinical topic addressed by the source article: Skin odor signatures may shift with age
Key Mechanisms
Skin odor profiles reflect glandular secretions and microbial metabolism. Age-associated patterns include acidic VOCs in infancy, androgen-related compounds during puberty, and 2-nonenal in older populations; the proposed oxidative mechanism for 2-nonenal has not been experimentally established. Corynebacterium, Staphylococcus, and Cutibacterium acnes were associated with production of different VOCs.
Target Population
People across the lifespan; the review also describes sex-related differences during reproductive age and menstrual-cycle-associated variation in female profiles.
Care Setting
Care setting described in the source article.
Key Highlights
The narrative review included 55 studies; the median sample size among included studies was 35 participants.
Fatty acids were the most abundant chemical class, and 3-methyl-2-hexenoic acid was identified as a characteristic axillary odorant.
Infant profiles were dominated by acidic VOCs; puberty was associated with androgen-related steroid VOCs and increased branched-chain fatty acids.
In older populations, studies reported emergence of 2-nonenal, with concentrations increasing after age 40 years.
Disease-detection evidence, including studies of diabetes and melanoma, was preliminary; most studies enrolled fewer than 50 participants and lacked independent validation.
Guideline-Based Recommendations
Diagnosis
The review does not establish skin odor profiling as a diagnostic method for disease.
Management
The authors called for standardized analytical protocols and rigorous validation before odor-based approaches move toward clinical use.
Monitoring & Follow-up
The authors identified longitudinal studies and normative reference data as research needs.
Risks
Potential influences such as diet, medication use, and hygiene were controlled inconsistently across studies.
The evidence base was limited by predominantly cross-sectional designs, small samples, methodological variation, and insufficient independent validation.
Patient & Prescribing Data
The review describes skin VOC patterns across age and sex; it does not provide prescribing data or treatment recommendations.
No treatments were evaluated. Potential clinical applications in disease detection and health monitoring were described as preliminary.
Clinical Best Practices
The review reports limited longitudinal evidence and small samples in studies of age-associated odor patterns.
The review reports that disease-detection studies generally lacked independent validation; odor signatures are not established as diagnostic tests.
The authors identified standardized analytical protocols, control of relevant confounders, longitudinal studies, and normative reference data as research needs.
