Cortisol is considered to be a stress hormone. Its secretion is increased during times of stress.
Traditionally it’s been measured in serum, urine and saliva, but that only shows stress at the time of measurement, not over longer periods of time. Cortisol is also captured in the hair shaft.
Koren and Uum believe hair analysis can provide an accurate assessment of stress levels in the months prior to an acute event such as a heart attack.
“We know that on average, hair grows one centimetre (cm) a month, and so if we take a hair sample six cm long, we can determine stress levels for six months by measuring the cortisol level in the hair.”
Hair as Biomarker of Stress and Heart Disease
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