What Blood Tests Should I Get for Hair Loss?
The most important blood tests for hair loss are TSH, thyroid antibodies, ferritin, CBC, vitamin D, testosterone, and DHEA-S. Low ferritin is the leading reversible cause in women, and thyroid dysfunction is a close second. These tests identify the most treatable causes of hair thinning.
Possible Causes
Recommended Tests
When to See a Doctor
If your hair loss 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
Related Symptoms
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Content reviewed for accuracy by the JustLabs editorial team.