Genetics plays a critical role in regulating cortisol, as demonstrated by the association of the SERPINA6/1 locus with plasma cortisol concentrations in a genome-wide association meta-analysis (GWAMA). These genes are integral to glucocorticoid transport and regulation, highlighting a direct genetic influence on cortisol availability. This study examines the genetic contribution to hair cortisol concentration (HCC) in adolescents from the 2004 Pelotas (Brazil) Birth Cohort at age 15, employing…
