Why is this better than just testing thyroid?

Fatigue has many causes. While thyroid is common, so is iron deficiency, B12 deficiency, vitamin D deficiency, and blood sugar issues. Testing just one thing often misses the real cause.

What if everything comes back normal?

If these tests are normal, fatigue may be caused by sleep issues, stress/cortisol imbalance, other hormone issues, or conditions not captured here. Results help narrow down what to investigate next.

Why test ferritin instead of just iron?

Ferritin measures your iron reserves, which can be depleted even when serum iron is normal. Many people with "normal" iron have low ferritin and still experience fatigue. Ferritin is the more sensitive marker.

How quickly can I feel better after finding an issue?

It depends on the cause. Thyroid medication can improve symptoms in weeks. B12 shots may help quickly. Iron repletion takes 3-6 months. Knowing the cause lets you start targeted treatment.

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Panel✨ General HealthPopular

Energy & Fatigue Panel - Comprehensive Fatigue Testing

Fatigue has many causes - this panel tests for the most common ones: thyroid dysfunction, iron deficiency, vitamin deficiencies, anemia, and metabolic issues. Stop guessing, start knowing.

Fatigue is one of the most common complaints, but it's also one of the most undertested. This panel systematically checks for the major causes:

• TSH & Free T4 - Thyroid problems are a leading cause of fatigue • CBC with Differential - Detects anemia and blood cell abnormalities • Ferritin - Iron deficiency causes fatigue even without anemia • Vitamin B12 - Low B12 causes fatigue and brain fog • Vitamin D - Deficiency is linked to fatigue and depression • Comprehensive Metabolic Panel - Liver, kidney function, blood sugar, electrolytes

Instead of random tests, this panel provides a systematic approach to understanding your fatigue.

Panel Price

$72

All-in

$90

incl. $18 lab & physician fee

You Save

$4.50

Biomarkers

7 tests

Included Tests

TSH (Thyroid Stimulating Hormone)

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

TSH

Free T4 (Thyroxine)

Measures the unbound, active form of the thyroid hormone T4. Helps assess thyroid function and diagnose thyroid conditions.

Free T4

Complete Blood Count with Differential

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

WBCRBCHemoglobinHematocrit+10 more

Ferritin

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

Ferritin

$10

Vitamin B12

Measures B12 levels essential for nerve function, DNA synthesis, and red blood cell formation.

Vitamin B12

Vitamin D, 25-Hydroxy

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

Vitamin D25-OH

$25

Comprehensive Metabolic Panel

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

GlucoseBUNCreatinineeGFR+12 more

$9.50

Fasting

Fasting Required

One or more tests in this panel require fasting for accurate results:

Do not eat or drink anything except water for 8-12 hours before your blood draw.
Water is allowed and encouraged - stay hydrated!
Schedule your lab visit in the morning for convenience.

How long to fast, and what breaks a fast →

What This Panel Measures

This panel measures 7 categories: thyroid function (TSH, Free T4), blood cells (CBC with differential), iron stores (ferritin), vitamins (B12, D), and 14 metabolic markers (glucose, electrolytes, kidney/liver function). Over 35 individual biomarkers to comprehensively evaluate fatigue.

Who Should Get This Panel

Anyone experiencing unexplained fatigue, low energy, or feeling "tired but wired." Also for those who need afternoon naps, feel exhausted despite sleeping, have brain fog, or feel run down. Perfect starting point when you don't know what's causing your fatigue.

Health Insights

Conditions Screened

HypothyroidismHyperthyroidismIron deficiencyAnemiaB12 deficiencyVitamin D deficiencyDiabetes/prediabetesLiver issuesKidney issuesElectrolyte imbalance

Related Symptoms

FatigueLow energyBrain fogDifficulty waking upAfternoon slumpFeeling wired but tiredPoor exercise recoveryWeaknessDifficulty concentrating

When to Get Tested

Fasting for 8 hours is required for accurate glucose results. Morning testing is ideal for thyroid markers. This is a great first-line panel when investigating fatigue.

Understanding Your Results

Key targets: TSH 0.5-2.5, Free T4 1.0-1.5, Ferritin >50, B12 >500, Vitamin D 40-60, normal CBC ranges. Results will highlight any abnormalities that could be causing your fatigue.

How much does the Energy & Fatigue Panel cost?

The Energy & Fatigue Panel costs $72 at JustLabs — $90 all-in, since the $18 lab & physician order fee is charged once per order, however many tests you add. The price is fixed before your blood draw; no insurance or doctor visit needed.

Option	Price	Order all-in	Notes
Energy & Fatigue Panel at JustLabsDrawn at Quest Diagnostics	$72	$90	Includes the one $18 fee, charged once per order
The same 7 tests ordered individually	$76.50	$94.50	The panel saves $4.50

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