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Anxiety & Wellness

Inflammation and Anxiety:
The Connection Nobody's Talking About

Most of my patients arrive convinced their anxiety is psychological. They've been told it appeared from nowhere, or that it's a response to stress, or that they simply need to think differently about things. What they haven't been told — because most clinicians aren't trained in this — is that anxiety has a significant biological driver that shows up in a blood test. That driver is inflammation.

The gut-brain axis, the HPA stress response, and the inflammatory cascade are not separate systems. They are the same system running in different locations. When you treat anxiety without addressing underlying inflammation, you are managing a symptom while the cause runs unchecked. This article is my attempt to change that conversation.

What Is the Inflammation-Anxiety Link?

Inflammatory cytokines — the signalling proteins your immune system releases during an inflammatory response — cross the blood-brain barrier and directly alter neurotransmitter function. Specifically, they reduce serotonin availability, impair dopamine signalling, and activate the amygdala (the brain's threat-detection centre). The result, from a symptomatic perspective, is indistinguishable from an anxiety disorder.

This is not a fringe theory. A meta-analysis published in JAMA Psychiatry in 2018 found that elevated inflammatory markers — particularly IL-6 and CRP — were consistently associated with anxiety disorders across multiple cohorts. A 2020 review in Neuroscience & Biobehavioral Reviews found bidirectional causation: anxiety increases inflammation, and inflammation worsens anxiety. They feed each other.

For perimenopausal women, this matters even more. Oestrogen is anti-inflammatory. As it declines erratically in perimenopause, inflammatory markers rise. Women in perimenopause who experience anxiety often have a combined load: hormonal-driven neurochemical changes AND elevated inflammation amplifying those changes. Treating one without the other consistently delivers partial results.

What Drives Inflammation in Midlife Women?

Understanding the sources matters, because most of them are modifiable. The primary drivers in the women I see in practice:

What You Can Actually Do

The good news is that the most effective anti-inflammatory interventions are also excellent anxiety interventions — and vice versa. You are addressing both simultaneously.

Omega-3 fatty acids (EPA + DHA) are the most well-evidenced dietary anti-inflammatory intervention. EPA specifically has meaningful evidence for anxiety reduction — several meta-analyses have found EPA-dominant omega-3 supplementation reduces anxiety scores comparably to low-dose SSRIs in some populations. The dose needs to be therapeutic: at least 2g of combined EPA+DHA daily, from a high-quality supplement that has been independently tested for oxidation.

Curcumin with piperine inhibits NF-κB — the same inflammatory pathway that oestrogen decline activates. Bioavailability is the critical issue: standard curcumin is poorly absorbed. Look for formulations with piperine (black pepper extract) or phospholipid complexes, which increase absorption dramatically. The evidence for curcumin in anxiety is newer but promising — a 2020 RCT found meaningful reductions in anxiety and depression scores after 8 weeks.

Probiotic supplementation targeting gut-brain axis inflammation is one of the most underutilised interventions in anxiety management. Multi-strain probiotics containing Lactobacillus rhamnosus and Bifidobacterium longum have the strongest evidence for anxiety reduction via gut microbiome pathways. Combine with prebiotic fibre (vegetables, legumes, green banana) to support their establishment.

Magnesium glycinate addresses both arms of the problem: it reduces inflammatory markers (particularly CRP) and has direct GABAergic effects in the brain, calming the nervous system. Many women find this the most immediately noticeable intervention. 300–400mg elemental magnesium glycinate before bed.

Mediterranean-pattern eating is the dietary change with the strongest evidence base. It doesn't have to be perfect. Moving from an ultra-processed majority to a whole-food majority — more oily fish, olive oil, vegetables, legumes, and berries — consistently reduces inflammatory markers within 8–12 weeks. I tell patients: you don't need to eat perfectly. You need to eat better than you currently do.

What to Test — Asking Your GP

If you suspect inflammation is contributing to your anxiety, these are the tests worth requesting:

• hs-CRP (high-sensitivity C-reactive protein) — the most practical marker of systemic inflammation. Below 1mg/L is optimal; 1–3mg/L is elevated; above 3mg/L is high.
• Fasting insulin + glucose — insulin resistance is strongly pro-inflammatory and extremely common in perimenopause due to oestrogen's role in glucose metabolism.
• Ferritin + iron studies — both iron deficiency and iron excess drive inflammation. Optimal ferritin for women is 50–100 μg/L, not just "in range."
• Vitamin D (25-OH) — deficiency is independently pro-inflammatory and extremely common in NZ women. Target 75–100 nmol/L.

The women who make the most progress with anxiety in perimenopause are rarely the ones who have found the right SSRI. They are the ones who have addressed their sleep, their gut, their inflammation, and their hormones — in that order, or all at once. The biology responds. It almost always responds.

— Guest Contributor, Integrative Medicine Physician, New Zealand