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.

Find Out Why You Can't Sleep

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 Sleep Panel

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.