Perimenopause and Anxiety: Is It Your Hormones or Your Life?

By Rene Schliebs — Clinical Nutritionist, Medical Herbalist & Menopause Expert

A pattern I see constantly in clinic:

A woman in her early to mid 40s comes in describing anxiety. Not the anxiety she's always had, if she has, something different. New. A low-level hum of unease that doesn't track with anything happening in her life. Or a sudden racing heart at 2 am for no reason. Or a tendency to catastrophise that feels completely out of character.

She's often been to her GP. Sometimes she's been offered antidepressants. Sometimes she's been told it's stress. Almost never has anyone connected it to her hormones.

But that connection is real, it's well established, and it changes everything about how to approach it.

Hormones and the anxiety brain

Estrogen has a direct effect on serotonin, the neurotransmitter most associated with mood stability and a sense of well-being. It increases serotonin receptor sensitivity and supports serotonin production. When estrogen fluctuates, as it does in perimenopause, sometimes spiking, sometimes dropping, serotonin activity fluctuates with it. The result can be mood instability, low mood, and anxiety that tracks your cycle but feels impossible to predict.

Progesterone acts on GABA receptors, the same receptors targeted by anti-anxiety medications. GABA is your brain's primary calming neurotransmitter. Progesterone's metabolite, allopregnanolone, is one of the most potent natural activators of GABA activity we know of. When progesterone declines in perimenopause, that natural calming effect is reduced. Women who were previously resilient under stress often find that their nervous system simply doesn't settle the way it used to.

The cortisol connection

Perimenopause also affects the HPA axis, the hormonal pathway that regulates your stress response. Many women in perimenopause have a dysregulated cortisol curve: waking cortisol that's too high, afternoon cortisol that doesn't drop when it should, or a blunted response that leaves them feeling flat and depleted.

This dysregulation means the nervous system is effectively running hotter than it should, more reactive, less able to return to baseline after stress, more prone to that constant background hum of anxiety.

Is it your hormones or your life?

Honestly, often both. Perimenopause frequently coincides with significant life stressors: aging parents, teenage children, relationship changes, career transitions, and grief. The hormonal changes don't create these stressors, but they dramatically reduce your buffer for handling them.

The women I see are not anxious because their lives are harder than everyone else's. They're anxious because their neurological capacity to absorb and process stress has been reduced by hormonal change, and nobody told them that was happening.

That distinction matters enormously. Because it means the anxiety is not a psychological failing. It is a physiological change that responds to physiological support.

What helps

Magnesium glycinate or threonate. Magnesium directly supports GABA activity and has robust evidence for reducing anxiety. It's one of the first things I recommend, and the response is often noticeable within one to two weeks.

Blood sugar stability. Blood sugar drops are a direct trigger for cortisol release and anxiety symptoms, heart racing, shakiness, and sudden dread. Eating regular meals with adequate protein, avoiding long gaps and reducing refined sugar can meaningfully reduce anxiety frequency.

Adaptogens for cortisol support. Herbs like Ashwagandha, Rhodiola and Withania have good evidence for supporting HPA axis regulation and reducing cortisol-driven anxiety. These need to be selected carefully based on your individual pattern; not all adaptogens suit all women. Seek advice.

Nervous system regulation practices. Slow, extended exhale breathing activates the vagus nerve and directly downregulates the stress response. Even five minutes of slow breathing, in for 4 counts, out for 6 to 8, can shift the nervous system out of high alert. This is not just wellness advice; it is physiology.

Address the hormonal picture. If anxiety is significantly impacting your quality of life, it is worth discussing hormone support with a specialist. Body-identical progesterone, in particular — given its direct effect on GABA — can be profoundly helpful for women whose anxiety is predominantly progesterone-driven. This is a conversation worth having, and one your GP may not initiate unless you do.

When to seek help

If anxiety is severe, persistent, or accompanied by depression, please do seek professional support, from both a mental health perspective and a hormonal one. These are not mutually exclusive. Many women benefit from addressing both simultaneously.

What I want you to take from this post is that if your anxiety has changed in your 40s, in its quality, its intensity, or its relationship to your cycle, that is information. It is your body communicating a hormonal shift. And you deserve care that takes that seriously.

👉Book a virtual 1:1 consultation — let's look at whether your anxiety is hormonally driven and what support makes sense for you.

👉Explore my Thrive Starter Programme — a clear starting point for understanding everything that's happening in your body right now.

Warmly, Rene x

Rene Schliebs is a Clinical Nutritionist and Medical Herbalist with over 20 years of experience supporting women's hormonal health. Before making any changes, please seek medical advice.