What Blood Tests Should I Get for Insomnia?
The top blood tests for insomnia are TSH, cortisol, ferritin, magnesium, and vitamin D. Thyroid dysfunction disrupts sleep cycles, elevated cortisol prevents sleep onset, and low iron causes restless legs. These tests identify the most common medical causes of persistent insomnia.
Possible Causes
Recommended Tests
$72 + $18 order fee · $90 all-in
The 7 tests ordered separately: $76.50 (save $4.50)
Includes 4 of the 6 recommended tests below (not included: Total Cortisol, RBC Magnesium), plus 3 more.
All 6 recommended tests
$83 + one $18 order fee = $101 all-in
When to See a Doctor
If your insomnia is severe, rapidly worsening, or accompanied by alarming symptoms (chest pain, shortness of breath, high fever), seek immediate medical attention. Blood tests are a valuable first step, but they don't replace evaluation by a healthcare professional.
Frequently Asked Questions
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Content reviewed for accuracy by the JustLabs editorial team.