Energy, Brain Fog, & Iron

Blood tests for energy, iron & thyroid questions

Compare focused packages for low energy, iron stores, B12 and hair shedding. Choose the question you want answered, then see the full test list and price.

Compare 10 packages ↓Get help choosing

Start here

Which package fits your question?

Low energy with an iron question

Start by comparing the iron studies and CBC options. The $90 package checks ferritin and iron measures alongside a blood count; the $85 focused iron package omits the CBC.

A borderline B12 result

The $120 B12, folate and MMA option is a focused three-marker package. It may fit a clinician’s request to investigate B12 without repeating a broad general panel.

Hair shedding or thyroid concerns

The $110 hair-shedding package combines iron studies, thyroid tests and a CBC. A different $95 package pairs thyroid testing with a CBC. Choose based on the tests your clinician wants, not the largest marker count.

Explore the test details

Iron & ferritin blood test$90 package · See details →Vitamin B12, folate & MMA blood test$120 package · See details →Hair shedding: iron & thyroid blood tests$110 package · See details →

Energy, Brain Fog, & Iron

Compare prices and expand each test list. Package names can overlap in purpose and biomarkers; choosing more than one may repeat tests.

Energy, Brain Fog, & Iron

Tired With a Normal CBC? Check Your Iron Stores

Your blood count came back normal, but climbing the stairs still feels harder than it used to. Iron stores can fall before hemoglobin does. See how much iron you have in reserve and how much is available to make red blood cells. It’s a starting point for discussing iron-rich foods, absorption and possible blood loss with your care team.

Package details & cost →
View all 37 biomarkers
  • Iron, Total
  • Ferritin
  • Total Iron Binding Capacity (TIBC)
  • Iron % Saturation
  • Red Cell Distribution Width (RDW)
  • Neutrophils (%)
  • Monocytes (%)
  • Lymphocytes (%)
  • Eosinophils (%)
  • Basophils (%)
  • Platelet Count
  • Mean Corpuscular Hemoglobin Concentration (MCHC)
  • Mean Corpuscular Hemoglobin (MCH)
  • Mean Corpuscular Volume
  • Hematocrit
  • Hemoglobin (HGB)
  • Band Neutrophils
  • Blasts
  • Metamyelocytes
  • Myelocytes
  • Nucleated RBC
  • Promyelocytes
  • Band Neutrophils (%)
  • Basophils
  • Blasts (%)
  • Eosinophils
  • Lymphocytes
  • Metamyelocytes (%)
  • Monocytes
  • Myelocytes (%)
  • Neutrophils
  • Nucleated RBC (%)
  • Promyelocytes (%)
  • Reactive Lymphocytes
  • Mean Platelet Volume (MPV)
  • White Blood Cell Count (WBC)
  • Red Blood Cell Count (RBC)
$90Package price
HSA/FSA eligible
Order this package

Collection included in the price.

Energy, Brain Fog, & Iron

Heavy Periods & Low Energy

If you plan your week around a heavy period and feel drained for days afterward, check what those cycles may be costing you in iron. Ferritin measures your reserves. Hemoglobin shows whether anemia has developed. Bring both results to the clinician helping you manage the bleeding.

View all 37 biomarkers
  • Iron, Total
  • Ferritin
  • Total Iron Binding Capacity (TIBC)
  • Iron % Saturation
  • Red Cell Distribution Width (RDW)
  • Neutrophils (%)
  • Monocytes (%)
  • Lymphocytes (%)
  • Eosinophils (%)
  • Basophils (%)
  • Platelet Count
  • Mean Corpuscular Hemoglobin Concentration (MCHC)
  • Mean Corpuscular Hemoglobin (MCH)
  • Mean Corpuscular Volume
  • Hematocrit
  • Hemoglobin (HGB)
  • Band Neutrophils
  • Blasts
  • Metamyelocytes
  • Myelocytes
  • Nucleated RBC
  • Promyelocytes
  • Band Neutrophils (%)
  • Basophils
  • Blasts (%)
  • Eosinophils
  • Lymphocytes
  • Metamyelocytes (%)
  • Monocytes
  • Myelocytes (%)
  • Neutrophils
  • Nucleated RBC (%)
  • Promyelocytes (%)
  • Reactive Lymphocytes
  • Mean Platelet Volume (MPV)
  • White Blood Cell Count (WBC)
  • Red Blood Cell Count (RBC)
$90Package price
HSA/FSA eligible
Order this package

Collection included in the price.

Energy, Brain Fog, & Iron

Is My Anemia Treatment Working?

Already treating iron-deficiency anemia and wondering when you’ll feel a difference? New red blood cells can offer an early sign of response. At the interval your clinician recommends, compare your red-cell production and hemoglobin with your starting results before changing your iron plan.

View all 41 biomarkers
  • Folate
  • Vitamin B12 (Cobalamin)
  • Iron, Total
  • Ferritin
  • Total Iron Binding Capacity (TIBC)
  • Iron % Saturation
  • Red Cell Distribution Width (RDW)
  • Neutrophils (%)
  • Monocytes (%)
  • Lymphocytes (%)
  • Eosinophils (%)
  • Basophils (%)
  • Platelet Count
  • Mean Corpuscular Hemoglobin Concentration (MCHC)
  • Mean Corpuscular Hemoglobin (MCH)
  • Mean Corpuscular Volume
  • Hematocrit
  • Hemoglobin (HGB)
  • Band Neutrophils
  • Blasts
  • Metamyelocytes
  • Myelocytes
  • Nucleated RBC
  • Promyelocytes
  • Band Neutrophils (%)
  • Basophils
  • Blasts (%)
  • Eosinophils
  • Lymphocytes
  • Metamyelocytes (%)
  • Monocytes
  • Myelocytes (%)
  • Neutrophils
  • Nucleated RBC (%)
  • Promyelocytes (%)
  • Reactive Lymphocytes
  • Mean Platelet Volume (MPV)
  • White Blood Cell Count (WBC)
  • Red Blood Cell Count (RBC)
  • Reticulocyte Count, Automated
  • Reticulocyte, Absolute
$110Package price
HSA/FSA eligible
Order this package

Collection included in the price.

Energy, Brain Fog, & Iron

Always Cold, Tired, or Constipated?

If you’re adding layers indoors, feeling sluggish and dealing with constipation, it’s reasonable to ask about both thyroid function and anemia. This pair checks for thyroid and blood-count changes that could help explain the pattern and guide a more focused nutrition or medical visit.

View all 36 biomarkers
  • Thyroid-Stimulating Hormone
  • Free T3
  • Free T4
  • Red Cell Distribution Width (RDW)
  • Neutrophils (%)
  • Monocytes (%)
  • Lymphocytes (%)
  • Eosinophils (%)
  • Basophils (%)
  • Platelet Count
  • Mean Corpuscular Hemoglobin Concentration (MCHC)
  • Mean Corpuscular Hemoglobin (MCH)
  • Mean Corpuscular Volume
  • Hematocrit
  • Hemoglobin (HGB)
  • Band Neutrophils
  • Blasts
  • Metamyelocytes
  • Myelocytes
  • Nucleated RBC
  • Promyelocytes
  • Band Neutrophils (%)
  • Basophils
  • Blasts (%)
  • Eosinophils
  • Lymphocytes
  • Metamyelocytes (%)
  • Monocytes
  • Myelocytes (%)
  • Neutrophils
  • Nucleated RBC (%)
  • Promyelocytes (%)
  • Reactive Lymphocytes
  • Mean Platelet Volume (MPV)
  • White Blood Cell Count (WBC)
  • Red Blood Cell Count (RBC)
$95Package price
HSA/FSA eligible
Order this package

Collection included in the price.

Energy, Brain Fog, & Iron

Borderline B12 & Tingling

Your B12 result is near the low end, and you’re noticing pins and needles or a sore tongue. MMA can help clarify whether your body has enough B12 to use. Review the pair with your clinician, especially if you have kidney disease, which can also raise MMA. New or worsening numbness deserves prompt medical review.

Package details & cost →
View all 3 biomarkers
  • Folate
  • Vitamin B12 (Cobalamin)
  • Methylmalonic Acid
$120Package price
HSA/FSA eligible
Order this package

Collection included in the price.

Energy, Brain Fog, & Iron

Why Are My Red Blood Cells Large?

An MCV flagged high on your blood count can be confusing, especially if you’re also tired. B12 and folate help your body make healthy red blood cells. Checking both gives you and your clinician a way to explore two nutritional explanations before deciding which supplement, if any, fits.

View all 12 biomarkers
  • Folate
  • Vitamin B12 (Cobalamin)
  • Red Cell Distribution Width (RDW)
  • Platelet Count
  • Mean Corpuscular Hemoglobin Concentration (MCHC)
  • Mean Corpuscular Hemoglobin (MCH)
  • Mean Corpuscular Volume
  • Hematocrit
  • Hemoglobin (HGB)
  • Mean Platelet Volume (MPV)
  • White Blood Cell Count (WBC)
  • Red Blood Cell Count (RBC)
$90Package price
HSA/FSA eligible
Order this package

Collection included in the price.

Energy, Brain Fog, & Iron

When Ferritin Is Hard to Interpret

If your ferritin looks normal or high during an inflammatory illness, the number can be tricky to interpret. See iron stores, available iron and a marker of inflammation together. This helps your clinician decide whether more iron, a repeat test after recovery or another evaluation makes sense.

View all 5 biomarkers
  • hsCRP
  • Iron, Total
  • Ferritin
  • Total Iron Binding Capacity (TIBC)
  • Iron % Saturation
$95Package price
HSA/FSA eligible
Order this package

Collection included in the price.

Energy, Brain Fog, & Iron

Restless Legs at Night? Check Your Iron

An urge to move your legs that settles when you walk can make bedtime miserable. If you and your clinician are evaluating restless legs, these are the two iron measures used to guide that conversation. Ask about collection timing and bring your current iron dose, if you take one.

View all 4 biomarkers
  • Iron, Total
  • Ferritin
  • Total Iron Binding Capacity (TIBC)
  • Iron % Saturation
$85Package price
HSA/FSA eligible
Order this package

Collection included in the price.

Energy, Brain Fog, & Iron

Plant-Based Energy Check

If you eat little or no meat and your energy has dipped, this panel looks at two nutrients worth reviewing alongside your meals. Use the results to decide where iron-rich plant foods, fortified foods or B12 support deserve more attention in your routine.

View all 39 biomarkers
  • Iron, Total
  • Ferritin
  • Total Iron Binding Capacity (TIBC)
  • Iron % Saturation
  • Folate
  • Vitamin B12 (Cobalamin)
  • Red Cell Distribution Width (RDW)
  • Neutrophils (%)
  • Monocytes (%)
  • Lymphocytes (%)
  • Eosinophils (%)
  • Basophils (%)
  • Platelet Count
  • Mean Corpuscular Hemoglobin Concentration (MCHC)
  • Mean Corpuscular Hemoglobin (MCH)
  • Mean Corpuscular Volume
  • Hematocrit
  • Hemoglobin (HGB)
  • Band Neutrophils
  • Blasts
  • Metamyelocytes
  • Myelocytes
  • Nucleated RBC
  • Promyelocytes
  • Band Neutrophils (%)
  • Basophils
  • Blasts (%)
  • Eosinophils
  • Lymphocytes
  • Metamyelocytes (%)
  • Monocytes
  • Myelocytes (%)
  • Neutrophils
  • Nucleated RBC (%)
  • Promyelocytes (%)
  • Reactive Lymphocytes
  • Mean Platelet Volume (MPV)
  • White Blood Cell Count (WBC)
  • Red Blood Cell Count (RBC)
$100Package price
HSA/FSA eligible
Order this package

Collection included in the price.

Energy, Brain Fog, & Iron

More Hair in the Shower? Iron & Thyroid Check

If the extra shedding keeps up, your clinician may want to look at iron stores and thyroid function. These results can narrow that conversation, especially after a period of limited eating or heavier menstrual bleeding. Bring a timeline of when the shedding started and any recent changes in food or medications.

Package details & cost →
View all 40 biomarkers
  • Iron, Total
  • Ferritin
  • Total Iron Binding Capacity (TIBC)
  • Iron % Saturation
  • Thyroid-Stimulating Hormone
  • Free T3
  • Free T4
  • Red Cell Distribution Width (RDW)
  • Neutrophils (%)
  • Monocytes (%)
  • Lymphocytes (%)
  • Eosinophils (%)
  • Basophils (%)
  • Platelet Count
  • Mean Corpuscular Hemoglobin Concentration (MCHC)
  • Mean Corpuscular Hemoglobin (MCH)
  • Mean Corpuscular Volume
  • Hematocrit
  • Hemoglobin (HGB)
  • Band Neutrophils
  • Blasts
  • Metamyelocytes
  • Myelocytes
  • Nucleated RBC
  • Promyelocytes
  • Band Neutrophils (%)
  • Basophils
  • Blasts (%)
  • Eosinophils
  • Lymphocytes
  • Metamyelocytes (%)
  • Monocytes
  • Myelocytes (%)
  • Neutrophils
  • Nucleated RBC (%)
  • Promyelocytes (%)
  • Reactive Lymphocytes
  • Mean Platelet Volume (MPV)
  • White Blood Cell Count (WBC)
  • Red Blood Cell Count (RBC)
$110Package price
HSA/FSA eligible
Order this package

Collection included in the price.

Before you choose

Useful answers.

Is there one blood test for fatigue?

Fatigue has many possible causes. These packages investigate selected iron, blood-count, thyroid or B12 questions. Your history and symptoms help determine which tests will change your care.

Why do some packages have the same price and tests?

Some packages address different concerns with overlapping biomarkers. Compare the expanded lists before choosing; a different title does not necessarily mean you need a second panel.

Does every package include a CBC?

No. The complete test list is shown on each card. Focused options such as B12 with MMA or iron studies alone contain fewer tests.

Cost and collection

Packages in this category cost $85–$120. Quest collection is included in the listed price. Review available Quest locations for your address during ordering.

Preparation and results

Follow your selected package’s instructions for fasting and other preparation. Your provider reviews your results and shares next steps. Testing is cash-pay; every lab package in this store is HSA/FSA eligible.

Explore another category

Information from New Approach Health. Prices and included markers checked November 7, 2026.

Further reading: MedlinePlus: iron testsMedlinePlus: ferritin blood testMedlinePlus: methylmalonic acid testAmerican Academy of Dermatology: hair loss diagnosisAmerican Academy of Dermatology: causes of hair loss