Blood Test for Sleep Problems
May 18, 2026
Blood Test for Sleep Problems
A blood test for sleep problems investigates the medical conditions that disrupt sleep—including overactive thyroid (causes insomnia), iron deficiency (causes restless legs), low vitamin D, blood sugar instability, cortisol imbalances, and hormonal changes (perimenopause, low testosterone)—because persistent sleep problems often have an identifiable, treatable cause.
At Blood Test London, our sleep investigation panel costs from £295 with results in 2-3 days. A doctor always reviews every result.
Medical Causes of Poor Sleep
Thyroid Dysfunction
Hyperthyroid: Causes insomnia, anxiety, racing heart
Hypothyroid: Causes fatigue but can disrupt sleep quality
Iron Deficiency
Causes restless leg syndrome
Common cause of sleep disruption
Often missed
Other Causes
Low vitamin D
Blood sugar swings
Cortisol imbalances
Perimenopause/menopause
Low testosterone (men)
What We Test
Priority Tests
Full thyroid function
Iron studies + ferritin
Vitamin D
HbA1c (blood sugar)
Full blood count
Extended Panel
Cortisol
Hormones (if indicated)
Magnesium
Our Sleep Testing Options
Essential Sleep Panel - £295
Thyroid function
Iron studies
Vitamin D
Blood sugar
Doctor review
Comprehensive Sleep Investigation - £395
All above plus:
Cortisol
Magnesium
Detailed interpretation
Sleep + Hormone Panel - £495
Complete panel
Full hormones
Extended consultation
Book Your Test
Price: From £295
Results: 2-3 days
Doctor review: A doctor always reviews every result
Book via WhatsApp | Phone: 020 3951 3429
Blood Test London by The Wellness. Sleep problem investigation from £295. A doctor always reviews every result.