Cortisol-DHEAS Ratio Predicts Biological Aging Better Than Either Hormone Alone
New study reveals combining stress hormones provides superior prediction of epigenetic age acceleration compared to single measurements.
Summary
Researchers analyzed 969 adults and found that the cortisol/DHEAS ratio was the strongest predictor of biological aging measured by epigenetic clocks. While cortisol alone showed some associations with aging markers, DHEAS by itself showed no significant relationships. The ratio outperformed individual hormone measurements across multiple epigenetic age calculators, suggesting that measuring both stress hormones together provides a more accurate assessment of stress-related aging than relying on cortisol measurements alone.
Detailed Summary
This groundbreaking study addresses a critical limitation in aging research: the unreliability of single stress hormone measurements for predicting biological age. Using data from 969 participants in the Midlife in the United States study, researchers investigated how cortisol, DHEAS, and their ratio relate to epigenetic age acceleration.
The research team analyzed six different epigenetic clocks (Horvath, Hannum, PhenoAge, GrimAge, and others) to measure biological aging. These clocks use DNA methylation patterns to estimate how fast someone is aging compared to their chronological age. Participants provided blood samples for hormone analysis, with careful attention to demographic factors including age, sex, and self-identified biosocial groups.
The key finding was that the cortisol/DHEAS ratio significantly outperformed either hormone measured alone in predicting epigenetic age acceleration. Cortisol showed positive correlations with three of the six epigenetic clocks, while DHEAS alone showed no significant associations with any aging markers. The ratio was particularly strong in predicting Hannum epigenetic age acceleration, suggesting it captures chronic stress effects better than individual measurements.
These findings have important implications for aging research and clinical practice. The cortisol/DHEAS ratio may serve as a more reliable biomarker for stress-related aging, potentially helping identify individuals at risk for accelerated biological aging. This could inform interventions targeting stress management and healthy aging strategies.
However, the study has limitations including its cross-sectional design and focus on two demographic groups. Future longitudinal studies across diverse populations will be needed to confirm these relationships and establish causality between hormonal imbalances and aging acceleration.
Key Findings
- Cortisol/DHEAS ratio was the strongest predictor of epigenetic age acceleration
- Cortisol alone correlated with 3 of 6 epigenetic clocks, DHEAS showed no associations
- Age, sex, and biosocial group significantly influenced all three hormonal measures
- Ratio outperformed individual hormones across multiple aging biomarkers
- Findings support co-measuring both hormones rather than cortisol alone
Methodology
Cross-sectional analysis of 969 adults from MIDUS study using fasting blood samples for hormone measurement and DNA methylation analysis for six different epigenetic age calculators. Statistical models controlled for age, sex, and self-identified biosocial group.
Study Limitations
Cross-sectional design prevents establishing causality. Study focused primarily on Caucasian and African American participants, limiting generalizability. Single-point hormone measurements may not capture long-term stress patterns despite theoretical advantages of the ratio.
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