No large study has systematically explored predictors of telomere length and telomere attrition.
Sociodemographic, lifestyle, and psychosocial, metabolic and physiological stressors linked with telomere length.
6-year telomere attrition almost completely predicted by baseline telomere length.
We suggest a strong internal homeostasis in the telomeric system.
Identified determinants may be targets of future studies to promote telomere maintenance and healthy aging.