Of all the hormones that affect women’s health, cortisol is perhaps the most underestimated. While oestrogen and progesterone receive most of the attention, cortisol sits at the top of the hormonal hierarchy — and when it is chronically elevated, it quietly disrupts virtually every other hormone in the body.
The stress response that cortisol drives is not inherently harmful. In fact, it is essential. Without cortisol, we could not mobilise energy during a crisis, reduce dangerous inflammation, or maintain blood pressure. The cortisol awakening response — the natural spike in the first 30 minutes after waking — helps the body transition from sleep to activity and is associated with alertness and readiness for the day ahead.
The problem is that the modern world keeps many women in a state of near-constant low-grade stress. The body cannot distinguish between a genuine physical threat and the chronic psychological stress of a demanding job, financial worry, relationship strain or the relentless pace of daily life. The HPA axis responds the same way regardless — and sustained activation has serious consequences for reproductive hormones, sleep, body composition, immunity and mood.
Chronically high cortisol suppresses GnRH — the master signal that drives oestrogen and progesterone production — which is why chronic stress so often disrupts the menstrual cycle, delays ovulation or causes periods to disappear in women who are overtraining or severely undereating. If you suspect cortisol dysregulation is affecting your health, HealthLab’s directory can connect you with an appropriate specialist in South Africa.
