Perimenopause comes with rapid changes in various hormone levels. Hormones are “chemical messengers” your body uses to regulate important things like metabolism, menstrual cycles, sleep, and more.

As such, a perimenopausal shift in certain hormone levels can dramatically affect different aspects of your body’s biology.

Consider melatonin, for example. Melatonin is a hormone your body releases into the bloodstream to promote a regular sleep-wake cycle.

As you age, however, your body releases less and less melatonin. A study by EverlyWell’s clinical research team – presented at the NIH’s “Sleep and the Health of Women” conference last year – found that melatonin levels are lower among women aged 50 and over compared to women under age 50 (a trend that has been shown in many other studies).

Many women begin entering menopause around this age – in the United States, the average age for entering menopause is 51 – which strongly suggests that melatonin levels play a role in the sleep issues often experienced by women transitioning into menopause.

Disclaimer: this is not medical advice, does not take the place of medical advice from your physician, and is not intended to treat or cure any disease. Patients should see a qualified medical provider for assessment and treatment.