Why Your Anxiety Has a Hormonal Component

Anxiety isn't only psychological. A clinical look at the hormonal contributors to anxiety — thyroid, cortisol, sex hormones, blood sugar — and how to assess them.

4 min readJune 24, 2026

A patient came to me last year having been in CBT for anxiety for three years. The therapy was good. The therapist was skilled. The patient had done substantial cognitive work and made meaningful progress on her anxious thinking patterns. And she was still, three years in, waking at 3 a.m. with her heart racing, trembling for no clear reason, and feeling fundamentally unsettled in her body in a way no amount of cognitive work was reaching.

We ran a comprehensive panel. Her thyroid was significantly elevated. Her cortisol rhythm was disrupted. Her ferritin was below 30. Her blood sugar was running unstable. None of these had been previously assessed because her family physician's standard panel did not include the relevant markers, and because everyone — including the patient — had assumed the anxiety was psychological.

After three months of integrative treatment addressing the biological dimensions, alongside continued therapy, the anxiety was significantly improved. Not because the therapy had been wrong. Because the therapy had been incomplete.

This article is about the hormonal and metabolic dimensions of anxiety — what they are, when they matter, and how to assess them. It is for anyone whose anxiety has not fully responded to therapy alone and who suspects there may be a biological dimension they have not yet examined.

Anxiety is a multi-system phenomenon

Anxiety is not only a psychological condition. It is a state of the whole body — nervous system, endocrine system, immune system, metabolic system — and disruptions in any of these systems can produce or amplify anxiety symptoms.

A non-exhaustive list of biological factors that can drive or worsen anxiety:

Thyroid dysfunction. Both hyperthyroidism and certain patterns of hypothyroidism can produce anxiety, palpitations, sleep disruption, and tremor that are clinically indistinguishable from primary anxiety disorder. Standard TSH-only screening misses many cases. A complete thyroid panel includes TSH, free T4, free T3, reverse T3, and thyroid antibodies (TPO and Tg).

Cortisol dysregulation. Cortisol — the primary stress hormone — has a normal diurnal rhythm (high in the morning, low at night) and acute responses to stress. When this rhythm is disrupted, anxiety often follows. The disruption may show as elevated baseline cortisol, blunted morning rise, or non-suppression at night. Salivary cortisol testing across the day captures this rhythm in ways a single blood draw cannot.

Sex hormone fluctuations. Estrogen and progesterone affect mood substantially. Premenstrual anxiety, postpartum anxiety, perimenopausal anxiety, and the anxiety associated with hormonal contraceptive changes are all real biological phenomena. The hormonal underpinning does not make the anxiety less real; it points to additional treatment options.

Blood sugar instability. When blood glucose drops too low or fluctuates rapidly, the body responds with adrenaline release that mimics anxiety attacks. Many panic-attack-like experiences are actually hypoglycemic episodes. Stable blood sugar is foundational anxiety care.

Iron deficiency. Low ferritin (often well above the clinical anemia threshold) is associated with anxiety, fatigue, and cognitive symptoms. Many menstruating women run chronically low without it being recognized.

B12 and folate deficiency. Both can produce or worsen anxiety and depression. Easy to test, easy to address.

Vitamin D deficiency. Common in BC residents, particularly in winter. Strong association with anxiety and mood symptoms.

Magnesium deficiency. Common, especially in adults under chronic stress (which depletes magnesium). Associated with anxiety, muscle tension, sleep disruption.

Inflammation. Chronic low-grade inflammation, often from gut dysfunction, food sensitivities, or chronic infection, has a measurable association with anxiety symptoms.

Caffeine and alcohol. Often overlooked. Caffeine in sensitive individuals can directly produce anxiety symptoms. Alcohol — even modest amounts — disrupts sleep architecture and produces rebound anxiety.

Medication side effects. Several common medications produce anxiety as a side effect. Worth reviewing your medication list with your physician if anxiety has emerged after starting something new.

When to suspect a biological dimension

Several signals point toward biological assessment being worthwhile:

Anxiety that has not responded to good therapy
New-onset anxiety in someone who has not been particularly anxious historically
Anxiety with prominent physical symptoms (palpitations, tremor, sweating, gut symptoms)
Anxiety associated with sleep disruption that does not match the cognitive content
Anxiety appearing or worsening at specific points in the menstrual cycle
Anxiety appearing or worsening with hormonal transitions (perimenopause, postpartum, contraceptive changes)
Anxiety alongside fatigue, brain fog, or other systemic symptoms
Family history of thyroid, autoimmune, or metabolic conditions

If several of these resonate, an integrative workup is worth considering.

What an integrative workup typically includes

A comprehensive naturopathic assessment of anxiety usually includes some combination of:

Complete thyroid panel (not just TSH)
Diurnal cortisol curve (saliva, four samples across the day)
Sex hormone panel timed to the menstrual cycle (for menstruating women)
Comprehensive metabolic panel including fasting glucose and insulin
Iron studies (ferritin, iron, TIBC, transferrin saturation)
B12, folate, vitamin D
Inflammatory markers (CRP, sometimes others)
Blood sugar monitoring (sometimes continuous glucose monitoring for selected cases)

Specific testing depends on the clinical picture. We do not run everything on everyone; we run what is indicated.

What treatment may involve

Once the picture is clear, treatment is calibrated to what the workup shows:

Targeted nutrient repletion for documented deficiencies. Iron, B12, vitamin D, magnesium — at therapeutic doses, in the right forms, monitored over time.

Botanical and adaptogenic support for cortisol and stress response. Specific herbs have research support for anxiety; we use them where they fit.

Dietary architecture for blood sugar stability and inflammatory load. Often more impact than supplementation.

Sleep architecture work if sleep is part of the picture.

Coordinated medical care with the patient's physician for thyroid, hormonal, or other conditions requiring conventional treatment. We refer when conventional management is appropriate, and we work alongside it when integrative support adds value.

Acupuncture where indicated, for its autonomic regulation effects.

Continued therapy for the psychological dimensions, which remain real even when biological dimensions are addressed. (See: Anxiety Counselling →.)

A note on responsible integrative practice

I want to be careful here: I am not suggesting that all anxiety is biological or that everyone with anxiety should run extensive lab panels. Most anxiety has both biological and psychological dimensions, and good integrative practice is not about replacing therapy with supplements. It is about adding the biological assessment that conventional anxiety care often skips, and using what is found to enhance — not replace — psychological work.

The patients who do best are those whose care addresses both dimensions in coordination. That is what we offer.

When to come in

If your anxiety has plateaued in therapy, or if the symptoms have a strong physical dimension, or if you simply want to know what an integrative workup would reveal — a Free Introductory Naturopathic Consultation is the place to start.