What Blood Tests Should I Get for Brittle Nails?

The top blood tests for brittle nails are ferritin, TSH, CBC, vitamin D, and a comprehensive metabolic panel. Iron deficiency is the leading nutritional cause of brittle nails, and hypothyroidism weakens nail structure. Both are common and treatable.

Possible Causes

Iron DeficiencyHypothyroidismAnemiaVitamin D Deficiency

Recommended Tests

Ferritin

$9

Measures iron storage protein. Best indicator of total body iron stores.

Order Test

Iron & TIBC

$9

Comprehensive iron panel including serum iron, TIBC, and saturation percentage.

Order Test

TSH

$8

Measures thyroid-stimulating hormone to evaluate thyroid function. TSH is the most sensitive marker for detecting thyroi...

Order Test

CBC w/ Diff

$5

Comprehensive blood cell analysis including red cells, white cells, platelets, and white cell differential.

Order Test

Vitamin D

$22

Measures vitamin D status. Deficiency is common and linked to bone health, immune function, and mood.

Order Test

CMP

$10

Measures 14 substances including glucose, electrolytes, kidney and liver function markers.

Order Test

When to See a Doctor

If your brittle nails 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

Hair LossDry SkinFatigueCold Intolerance

Related Articles

Thyroid Function Tests Without Insurance

How to get TSH, Free T4, and Free T3 tested affordably without insurance coverage.

Iron Binding Capacity Blood Test Explained

How TIBC and transferrin saturation help diagnose iron deficiency and overload.

Content reviewed for accuracy by the JustLabs editorial team.