Fatigue, Low Energy & Brain Fog - Essential Lab Panel
The Fatigue, Low Energy & Brain Fog Essential Lab Panel includes 12 tests and 96 biomarkers to review common causes of fatigue, low energy, and brain fog. It evaluates thyroid function, iron status, blood sugar, inflammation, nutrients, hydration, kidney and liver function, and metabolic health. Includes CBC, CMP, ferritin, iron/TIBC, TSH, Free T4, B12, folate, vitamin D, magnesium, A1c, hs-CRP, and urinalysis.
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The following is a list of what is included in the item above. Click the test(s) below to view what biomarkers are measured along with an explanation of what the biomarker is measuring.
Also known as: CBC, CBC includes Differential and Platelets, CBC/PLT w/DIFF, Complete Blood Count (includes Differential and Platelets)
NOTE: Ulta Lab Tests provides CBC test results from Quest Diagnostics as they are reported. Often, different biomarker results are made available at different time intervals. When reporting the results, Ulta Lab Tests denotes those biomarkers not yet reported as 'pending' for every biomarker the test might report. Only biomarkers Quest Diagnostics observes are incorporated and represented in the final CBC test results provided by Ulta Lab Tests.
Absolute Band Neutrophils (Only Reported If Detected)
Absolute Basophils
Absolute Blasts (Only Reported If Detected)
Absolute Eosinophils
Absolute Lymphocytes
Absolute Metamyelocytes (Only Reported If Detected)
Absolute Monocytes
Absolute Myelocytes (Only Reported If Detected)
Absolute Neutrophils
Absolute Nucleated Rbc (Only Reported If Detected)
Absolute Promyelocytes (Only Reported If Detected)
Band Neutrophils (Only Reported If Detected)
Basophils
Blasts (Only Reported If Detected)
Eosinophils
Hematocrit
Hemoglobin
Lymphocytes
MCH
MCHC
MCV
Metamyelocytes (Only Reported If Detected)
Monocytes
MPV
Myelocytes (Only Reported If Detected)
Neutrophils
Nucleated Rbc (Only Reported If Detected)
Platelet Count
Promyelocytes (Only Reported If Detected)
RDW
Reactive Lymphocytes (Only Reported If Detected)
Red Blood Cell Count
White Blood Cell Count
Also known as: Chem 12, Chemistry Panel, Chemistry Screen, CMP, Complete Metabolic Panel, Comprehensive Metabolic Panel CMP, SMA 12, SMA 20
Albumin
Albumin/Globulin Ratio
Alkaline Phosphatase
Alt
AST
Bilirubin, Total
Bun/Creatinine Ratio
Calcium
Carbon Dioxide
Chloride
Creatinine
Egfr African American
Egfr Non-Afr. American
GFR-AFRICAN AMERICAN
GFR-NON AFRICAN AMERICAN
Globulin
Glucose
Potassium
Protein, Total
Sodium
Urea Nitrogen (Bun)
Ferritin
Also known as: A1c, Glycated Hemoglobin, Glycohemoglobin, Glycosylated Hemoglobin, HA1c, HbA1c, Hemoglobin A1c, Hemoglobin A1c HgbA1C, Hgb A1c
HEMOGLOBIN A1C
Also known as: C-Reactive Protein, Cardio CRP, Cardio hs-CRP, CRP, High Sensitivity CRP, High-sensitivity C-reactive Protein, High-sensitivity CRP, Highly Sensitive CRP, hsCRP, Ultra-sensitive CRP
Hs Crp
Also known as: Iron and TIBC, Iron and Total Iron Binding Capacity TIBC, TIBC
% Saturation
Iron Binding Capacity
Iron, Total
Magnesium
Vitamin D, 25-Oh, D2
Vitamin D, 25-Oh, D3
Vitamin D, 25-Oh, Total
Also known as: Free T4, FT4, T4 Free
T4, Free
Also known as: Thyroid Stimulating Hormone Test, Thyrotropin Test
TSH
Also known as: UA, Complete, Urinalysis UA Complete, Urine Analysis, Complete
Amorphous Sediment (Only Reported If Detected)
Appearance
Bacteria
Bilirubin
Calcium Oxalate Crystals (Only Reported If Detected)
Casts (Only Reported If Detected)
Color
Crystals (Only Reported If Detected)
Glucose
Granular Cast (Only Reported If Detected)
Hyaline Cast
Ketones
Leukocyte Esterase
Nitrite
Occult Blood
Ph
Protein
Rbc
Reducing Substances (Only Reported If Detected)
Renal Epithelial Cells (Only Reported If Detected)
Specific Gravity
Squamous Epithelial Cells
Transitional Epithelial (Only Reported If Detected)
Triple Phosphate Crystals (Only Reported If Detected)
Uric Acid Crystals (Only Reported If Detected)
WBC
YEAST (Only Reported If Detected)
Also known as: Cobalamin, Folic Acid, Vitamin B 12, Vitamin B 12 and Folic Acid, Vitamin B12 Cobalamin and Folate Panel Serum, Vitamin B12/Folic Acid
Folate, Serum
Vitamin B12
The Fatigue, Low Energy & Brain Fog - Essential Lab Panel panel contains 12 tests with 95 biomarkers .
Overview
The Fatigue, Low Energy & Brain Fog Essential Lab Panel is designed for people who want a focused lab-based starting point for common biomarker patterns that may be related to fatigue, low energy, brain fog, poor focus, weakness, low stamina, and feeling mentally or physically drained.
Fatigue and brain fog can be influenced by several overlapping systems, including blood health, iron status, thyroid function, blood sugar regulation, inflammation, vitamin status, magnesium status, kidney function, liver function, hydration, and general metabolic wellness.
This Essential panel focuses on foundational tests often reviewed when fatigue symptoms are present, including CBC, CMP, ferritin, iron/TIBC, TSH, Free T4, vitamin B12, folate, vitamin D, magnesium, A1c, hs-CRP, and urinalysis.
This panel does not diagnose the cause of fatigue or brain fog by itself. Results should be reviewed with a licensed healthcare provider and interpreted with symptoms, sleep, stress, medications, supplements, diet, menstrual history if relevant, medical history, and lifestyle factors.
Why Order This Panel?
The Fatigue, Low Energy & Brain Fog Essential Lab Panel may be helpful for people who want a practical first-step review of common lab-related contributors to low energy, tiredness, poor focus, and reduced stamina.
This panel may help provide insight into:
- Blood count and anemia-related patterns
- Iron storage and iron availability
- Thyroid function
- Blood sugar patterns
- Low-grade inflammation
- Vitamin B12 and folate status
- Vitamin D status
- Magnesium status
- Liver, kidney, electrolyte, calcium, albumin, and protein markers
- Hydration and urine health patterns
This panel is a strong starting point for people who want a focused fatigue and brain fog evaluation before choosing a broader Advanced or Comprehensive panel.
This Panel May Be Helpful For People With
- Fatigue or low energy
- Brain fog or poor focus
- Low stamina
- Feeling tired despite sleeping
- Weakness or poor recovery
- Cold intolerance or thyroid-related symptoms
- Weight changes
- Heavy periods or low iron history
- Vegetarian, vegan, restricted, or low-calorie diets
- Muscle cramps or tension
- Low vitamin D history
- Low B12 or folate concerns
- Blood sugar concerns
- Inflammation concerns
- Dehydration or urine health concerns
- Interest in a focused fatigue baseline
What This Panel Helps Evaluate
This panel helps evaluate selected biomarkers related to:
- Fatigue and low energy
- Brain fog and cognitive wellness
- Blood health and oxygen delivery
- Iron storage and iron transport
- Thyroid hormone production
- Blood sugar and metabolic health
- Low-grade inflammation
- Vitamin B12 and folate status
- Vitamin D status
- Magnesium status
- Liver and kidney function
- Electrolyte and hydration patterns
- Urinalysis findings
Which Tier Is Right for Me?
Essential Lab Panel
The Fatigue, Low Energy & Brain Fog Essential Lab Panel is best for people who want a focused starting point. It reviews common lab areas related to fatigue, including blood count, iron status, thyroid screening, blood sugar, vitamin D, B12/folate, magnesium, inflammation, CMP, and urinalysis.
Choose Essential if you want a practical first step for fatigue, low energy, or brain fog.
Advanced Lab Panel
The Fatigue, Low Energy & Brain Fog Advanced Lab Panel is best for people who want deeper insight into thyroid hormones, thyroid antibodies, insulin resistance, inflammation, muscle enzymes, cortisol, DHEA-S, testosterone, estradiol, methylation, functional B12, zinc, selenium, and RBC magnesium.
Choose Advanced if symptoms are persistent, recurring, or involve energy crashes, thyroid symptoms, hormone concerns, muscle weakness, low libido, poor recovery, or brain fog.
Comprehensive Lab Panel
The Fatigue, Low Energy & Brain Fog Comprehensive Lab Panel is the broadest option. It includes the Essential and Advanced categories and may add deeper kidney/urine markers, autoimmune screening, CoQ10, omega fatty acid testing, pregnenolone, Reverse T3, and expanded mitochondrial support markers.
Choose Comprehensive if you want the broadest review of fatigue, brain fog, thyroid, hormones, inflammation, nutrients, kidney function, autoimmune patterns, and energy production.
Tests Included and Why They Matter
Blood Health, Oxygen Delivery & Iron Status
Fatigue often overlaps with blood count patterns, anemia, iron deficiency, low iron stores, and reduced oxygen delivery. This group helps evaluate whether the body has the blood and iron support needed for energy, stamina, mental clarity, and physical performance.
CBC, includes Differential and Platelets
The CBC evaluates red blood cells, white blood cells, hemoglobin, hematocrit, platelets, and white blood cell types.
This test is included because red blood cells and hemoglobin help carry oxygen throughout the body. Low hemoglobin, low hematocrit, anemia-related patterns, infection clues, immune changes, or platelet abnormalities may contribute to fatigue, weakness, dizziness, shortness of breath with exertion, low stamina, or poor recovery.
The CBC is one of the most useful first-line fatigue markers because it gives a broad view of oxygen-carrying capacity, immune activity, and general blood health.
Ferritin
Ferritin measures stored iron.
This test is included because low iron stores may contribute to fatigue, low energy, low stamina, restless legs, hair shedding, heavy period-related symptoms, weakness, dizziness, or poor exercise tolerance. Ferritin can help identify low iron stores even before anemia is obvious on a CBC.
Ferritin can also rise with inflammation, liver stress, metabolic issues, or iron overload, so it should be interpreted with iron/TIBC, CBC, hs-CRP, symptoms, and health history.
Iron and Total Iron Binding Capacity, TIBC
Iron and TIBC help evaluate circulating iron and iron transport capacity.
This test is included because ferritin alone does not fully show iron availability. Iron/TIBC provides additional context for iron deficiency, iron overload, anemia-related patterns, oxygen delivery, fatigue, weakness, and stamina.
Together, ferritin and iron/TIBC help create a more complete view of iron storage and iron availability.
Thyroid Function & Metabolic Energy
Thyroid hormones help regulate metabolism, energy production, body temperature, mood, bowel function, hair and skin health, and cognitive speed. Thyroid symptoms can strongly overlap with fatigue and brain fog.
TSH
TSH is a key thyroid screening marker.
This test is included because thyroid function may influence energy, weight, metabolism, mood, body temperature, constipation, hair changes, dry skin, and mental clarity. TSH provides an important starting point for thyroid-related fatigue review.
TSH is often reviewed when fatigue is accompanied by cold intolerance, weight changes, constipation, hair thinning, low mood, or sluggishness.
T4, Free
Free T4 measures the available form of thyroxine, a thyroid hormone.
This test is included because Free T4 provides additional thyroid hormone production context when reviewed with TSH and symptoms. TSH alone may not provide enough thyroid context for some people, especially when symptoms are persistent.
Free T4 may be useful when fatigue, cold intolerance, weight changes, constipation, low energy, or brain fog suggest possible thyroid involvement.
Blood Sugar, Metabolic Health & Energy Stability
Energy crashes, cravings, sleepiness after meals, poor focus, weight changes, and fatigue may overlap with blood sugar patterns. This group helps evaluate longer-term glucose regulation and general metabolic wellness.
Hemoglobin A1c
Hemoglobin A1c measures average blood sugar over approximately the past two to three months.
This test is included because blood sugar patterns may affect energy, focus, cravings, mood, metabolic wellness, and fatigue. A1c provides a longer-term view of glucose trends and may help support discussions about prediabetes, diabetes risk, metabolic fatigue, and energy crashes.
A1c is especially useful when fatigue overlaps with afternoon crashes, sugar cravings, weight changes, increased thirst, frequent urination, or a family history of diabetes.
Comprehensive Metabolic Panel, CMP
The CMP evaluates glucose, liver function, kidney function, electrolytes, calcium, albumin, total protein, and metabolic markers.
This test is included because fatigue review benefits from a broad organ-function baseline. CMP findings may provide context for hydration, electrolytes, glucose, liver enzymes, kidney markers, calcium, protein status, and metabolic wellness.
Abnormalities in electrolytes, kidney function, liver markers, glucose, calcium, albumin, or protein status may contribute to low energy or help guide follow-up discussions.
Inflammation & Recovery Context
Inflammation can contribute to fatigue, brain fog, body aches, poor recovery, and reduced energy. This group evaluates low-grade inflammation and helps interpret other markers such as ferritin.
hs-CRP
High-sensitivity C-reactive protein is a marker of low-grade inflammation.
This test is included because inflammation may contribute to fatigue, brain fog, metabolic stress, cardiovascular risk, and poor recovery. hs-CRP also helps interpret ferritin because ferritin may rise with inflammation.
hs-CRP is nonspecific and should be interpreted with symptoms, medical history, medications, body composition, lifestyle factors, and other lab findings.
B Vitamins, Nerve Function & Brain Fog Support
Vitamin B12 and folate are important for red blood cell production, nerve function, DNA synthesis, methylation, and cognitive wellness. This group is especially relevant when fatigue overlaps with brain fog, numbness, tingling, weakness, mood changes, or restricted diets.
Vitamin B12 and Folate Panel, Serum
This panel measures vitamin B12 and folate.
These nutrients support red blood cell production, nerve function, DNA synthesis, methylation, and general wellness. This test is included because B12 and folate status may provide context for fatigue, brain fog, weakness, numbness, tingling, anemia-related patterns, mood changes, and cognitive concerns.
B12 and folate are especially important for people with vegetarian or vegan diets, restricted diets, digestive concerns, metformin use, acid-reducing medication use, or neurologic-type symptoms.
Vitamin D, Magnesium & Nutrient Support
Nutrient status can influence energy production, muscle function, immune resilience, mood, sleep, and recovery. This group evaluates two common nutrient areas that may overlap with fatigue and low energy.
QuestAssureD™ 25-Hydroxyvitamin D, D2, D3, LC/MS/MS
Vitamin D testing measures vitamin D status.
This test is included because vitamin D supports bone health, immune function, muscle function, inflammation balance, mood, and general wellness. Low vitamin D status may overlap with fatigue, muscle aches, low resilience, and general wellness concerns.
Vitamin D is especially relevant for people with limited sun exposure, indoor lifestyles, darker skin tone, higher body weight, low vitamin D history, bone concerns, or muscle symptoms.
Magnesium
Magnesium supports muscle function, nerve signaling, sleep, glucose metabolism, blood pressure regulation, and energy production.
This test is included because magnesium may provide context for fatigue, muscle cramps, sleep quality, anxiety-like symptoms, blood sugar patterns, headaches, and nervous system function.
Magnesium can be useful to review when fatigue overlaps with cramps, poor sleep, stress, muscle tension, or metabolic concerns.
Urine Health, Hydration & Kidney Support
Hydration, kidney function, glucose handling, ketones, and urine findings may provide useful context when fatigue is present. This group adds a practical urine-based safety and wellness marker.
Urinalysis, UA, Complete
A complete urinalysis evaluates urine markers such as protein, blood, glucose, ketones, specific gravity, pH, and other findings.
This test is included because urine findings may provide context for hydration, kidney health, urinary findings, glucose handling, ketones, protein, and blood in urine.
Urinalysis can help identify patterns that may be relevant to fatigue, including dehydration, glucose or ketones in urine, urinary abnormalities, or kidney-related findings requiring provider review.
Related Biomarker Patterns This Panel May Help Identify
This panel may help identify or rule out lab patterns related to:
- Anemia or blood count abnormalities
- Low iron stores
- Abnormal iron availability
- Thyroid dysfunction
- Blood sugar imbalance
- Low-grade inflammation
- Low vitamin B12 or folate status
- Low vitamin D status
- Magnesium status
- Electrolyte or hydration patterns
- Liver or kidney marker changes
- Urinalysis abnormalities
- General metabolic wellness patterns
Professional Safety and Interpretation Notice
This panel is designed to support fatigue, low energy, and brain fog evaluation. It does not diagnose the cause of fatigue, cognitive symptoms, thyroid disease, anemia, nutrient deficiency, inflammation, diabetes, kidney disease, liver disease, or any condition by itself.
Results should be interpreted with a licensed healthcare provider and reviewed alongside symptoms, sleep, stress, diet, medications, supplements, exercise, menstrual status if relevant, age, sex, medical history, and health goals.
Do not stop or change any prescribed medication or supplement without guidance from your healthcare provider.
How to Prepare for This Panel
Preparation may vary depending on the specific tests and instructions provided with your order. In general:
- Fasting may be recommended because glucose and metabolic markers are included.
- Drink water normally unless instructed otherwise.
- Do not overhydrate immediately before urine testing.
- Bring a list of medications, supplements, vitamins, minerals, thyroid medications, and doses.
- Note symptoms such as fatigue, brain fog, sleep changes, stress, mood changes, weakness, dizziness, heavy periods, or numbness/tingling.
- For women, note menstrual cycle timing, menopause status, hormone therapy, and bleeding patterns if relevant.
- Follow all lab collection instructions provided with your order.
What Happens After You Receive Your Results?
After your results are available, your biomarkers can help organize fatigue and brain fog findings into areas such as blood health, iron status, thyroid function, blood sugar, inflammation, vitamin B12, folate, vitamin D, magnesium, kidney function, liver function, hydration, and urine health.
During the physician consultation, you can discuss whether your results suggest the need for follow-up testing, medication review, nutrition changes, thyroid review, lifestyle changes, sleep evaluation, or additional clinical care.
Additional Panels to Consider
Customers interested in the Fatigue, Low Energy & Brain Fog Essential Lab Panel may also consider:
- Fatigue, Low Energy & Brain Fog Advanced Lab Panel
- Fatigue, Low Energy & Brain Fog Comprehensive Lab Panel
- Thyroid & Metabolism Lab Panel
- Stress, Cortisol, Sleep & Burnout Lab Panel
- Vitamin, Mineral & Nutrient Deficiency Lab Panel
- Prediabetes & Insulin Resistance Lab Panel
- Inflammation, Autoimmune & Chronic Pain Lab Panel
- Women’s Hormone Balance & Perimenopause Lab Panel
- Men’s Testosterone, Energy & Vitality Lab Panel
- Medication & Supplement Safety Lab Panel
- Longevity & Healthy Aging Lab Panel
FAQ: Fatigue, Low Energy & Brain Fog Essential Lab Panel
What is the Fatigue, Low Energy & Brain Fog Essential Lab Panel?
The Fatigue, Low Energy & Brain Fog Essential Lab Panel is a focused blood and urine test panel that evaluates common biomarkers related to fatigue, low energy, brain fog, blood health, iron status, thyroid function, blood sugar, inflammation, vitamin D, B12, folate, magnesium, kidney function, liver function, and urine health.
What blood tests are commonly reviewed for fatigue?
Common fatigue-related blood tests may include CBC, CMP, ferritin, iron/TIBC, TSH, Free T4, vitamin B12, folate, vitamin D, magnesium, A1c, hs-CRP, and urinalysis. This Essential panel includes those foundational markers.
Does this panel help evaluate brain fog?
Yes. This panel includes markers that may be useful when brain fog overlaps with B12 or folate concerns, thyroid patterns, blood sugar imbalance, inflammation, vitamin D status, magnesium status, hydration patterns, or general metabolic issues. It does not diagnose the cause of brain fog by itself.
Why are thyroid markers included?
Thyroid function can affect energy, metabolism, mood, focus, weight, body temperature, hair, skin, and bowel patterns. This panel includes TSH and Free T4 for a focused thyroid review.
Why are ferritin and iron/TIBC included?
Ferritin measures stored iron, while iron/TIBC evaluates circulating iron and iron transport. Iron status may provide useful context for fatigue, weakness, low stamina, heavy periods, restless legs, dizziness, and anemia-related patterns.
Why are B12 and folate included?
Vitamin B12 and folate support red blood cell production, nerve function, DNA synthesis, methylation, and cognitive wellness. They may provide context for fatigue, brain fog, weakness, numbness, tingling, mood changes, and anemia-related patterns.
Why is vitamin D included?
Vitamin D supports muscle function, immune health, bone health, mood, and inflammation balance. Low vitamin D may overlap with fatigue, muscle aches, and general low-energy concerns.
Why is magnesium included?
Magnesium supports muscle function, nerve signaling, sleep, blood sugar metabolism, and energy production. It may provide context for fatigue, cramps, poor sleep, stress, and nervous system symptoms.
Why is A1c included?
Hemoglobin A1c provides a longer-term view of blood sugar patterns. Blood sugar imbalance may contribute to energy crashes, cravings, fatigue, brain fog, and metabolic health concerns.
Can this panel diagnose chronic fatigue syndrome?
No. This panel does not diagnose chronic fatigue syndrome, ME/CFS, thyroid disease, anemia, diabetes, or any condition by itself. It helps evaluate selected biomarkers that may be useful to review with a licensed healthcare provider.
Should I choose Essential, Advanced, or Comprehensive?
Choose Essential for a focused fatigue baseline, Advanced for deeper thyroid, metabolic, hormone, inflammation, and nutrient testing, and Comprehensive for the broadest review of fatigue, brain fog, autoimmune, kidney, hormone, methylation, omega, and mitochondrial markers.
Important Note
This panel is designed to help evaluate selected biomarkers that may be related to fatigue, low energy, brain fog, thyroid function, iron status, blood sugar, inflammation, vitamin D, B12, folate, magnesium, urine health, kidney function, liver function, and general metabolic wellness. It is not intended to diagnose, treat, cure, or prevent disease by itself. Results should be reviewed with a licensed healthcare provider.