Humans

High allostatic load associates with increased cancer risk

Participants in the highest quartile of allostatic load had over double the cancer risk compared to the lowest quartile, showing an odds ratio of 2.24.

Social Science & Medicine4 Oct 2026, 08:54 BST

In a nested case-control study of 955 incident cancer cases and 955 matched controls from the European Prospective Investigation into Cancer and Nutrition (EPIC)-Granada cohort, researchers evaluated whether allostatic load associates with cancer risk. Pre-diagnostic allostatic load was assessed using 16 biomarkers spanning neuroendocrine, cardiometabolic, renal, hepatic, and immune systems, measured an average of 15 years before diagnosis. Investigators tested four allostatic load algorithms using clinical versus distributional cutoffs and different weighting schemes. Higher allostatic load was associated with higher cancer risk. The equal-system-weighted clinical index demonstrated the best fit, showing an odds ratio of 1.30 per one-unit increase (95% CI: 1.18–1.42) and an odds ratio of 2.24 (95% CI: 1.68–2.99) for the highest quartile compared to the lowest.

Why it matters

Allostatic load reflects cumulative physiological wear and tear across multiple regulatory systems under chronic stress. These results support the idea that coordinated, multisystem biological dysregulation is a measurable contributor to long-term chronic disease risk.

Caveats

The study utilized an observational, nested case-control design in a single regional cohort, which limits generalizability and establishes correlation rather than direct causation.