Test Guide
Anxiety: Biomarker Factors That Can Play a Role
Anxiety is primarily a mental health condition and needs to be assessed and treated as such. A small number of biomarker patterns can mimic or worsen feelings of anxiety, and a blood test can help rule those out before assuming psychological causes. Biomarker testing can highlight underlying factors that may contribute to how you feel. It is not a diagnostic tool. The information below is educational and does not replace personalised medical advice.
Biomarker patterns sometimes linked with feelings of anxiety
Overactive thyroid (hyperthyroidism): A classic mimic of anxiety. Signals include rapid heart, tremor, sweating and restlessness. Worth ruling out before assuming psychological cause.
Low B12: Can cause neurological effects including anxiety, low mood and brain fog.
Low vitamin D: Some research links low vitamin D with mood changes and feelings of anxiety.
Perimenopausal hormone shifts: New-onset anxiety in mid-life is increasingly recognised as a perimenopausal presentation in some women.
Low iron / ferritin: Linked with anxiety and panic-like feelings in some studies.
What a blood test cannot do for anxiety
It cannot diagnose anxiety, panic disorder, generalised anxiety disorder or any other mental health condition. It cannot tell you whether therapy or medication will help.
Speak to your GP or a mental health professional about persistent anxiety. NHS talking therapies are available via self-referral in most areas of England.
When anxiety needs urgent help
If you are having thoughts of self-harm, suicide or harming others, please contact your GP, NHS 111, Samaritans (116 123) or emergency services immediately. Do not wait for blood test results.
Chxhealth panels that cover these markers
The panels below cover the biomarkers discussed above. Each comes with a plain English PDF report, lab analysis by Randox (UKAS, ISO 15189), and the phlebotomy fee included in the price.
Thyroid Health
To rule out overactive thyroid mimicking anxiety.
Tired All The Time
Covers B12, folate, vitamin D, iron and thyroid in one panel.
Hormonal Health
For perimenopausal contributors to new-onset anxiety.
Related biomarker guides
Read more about the markers discussed in this guide:
FAQs
Can a blood test tell me if I have anxiety?
No. Anxiety is a clinical diagnosis. A blood test can rule out a small number of biomarker patterns that mimic or worsen feelings of anxiety.
Should I see a GP or do a blood test first?
If anxiety is significantly affecting your life, see a GP or mental health professional first. Blood testing can complement that, not replace it.
Could my thyroid be causing my anxiety?
An overactive thyroid can produce a state very similar to anxiety. A thyroid panel can rule this in or out as a contributing factor.
Are there self-referral services available?
In most parts of England, NHS Talking Therapies accept self-referrals for anxiety and depression without needing to see a GP first.
About this guide. These tests provide biomarker data only. They do not diagnose any condition. Always discuss your results with a qualified clinician before making decisions about your health, medication or lifestyle. Educational content for general awareness. Chxhealth provides biomarker and genetic data. We do not diagnose, treat or prescribe. For medical advice about your health or results, please speak to a qualified clinician.