All Digestive System Tests

“All Digestive System Tests” brings your core GI lab options into one place. A proactive plan starts by matching your question—infection, inflammation, bleeding, malabsorption, reflux/dyspepsia, or pancreatic issues—to the right stool, breath, and blood tests. Noninvasive stool markers (calprotectin/lactoferrin) help separate inflammatory bowel disease (IBD) from non-inflammatory causes like IBS. Pathogen PCR and C. difficile testing identify infections fast. For upper-GI concerns, H. pylori stool antigen or urea breath tests evaluate ulcer risk. Chronic diarrhea, weight loss, or greasy ... See more

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The Vitamin A Test measures blood levels of vitamin A, a nutrient essential for vision, immune function, reproduction, and skin health. Low levels may indicate malnutrition, fat malabsorption, or liver disease, while high levels may suggest toxicity from over-supplementation. Doctors use this test to investigate night blindness, frequent infections, or poor wound healing. Results provide vital insight into nutritional status, metabolic function, and overall wellness.

: Serum
Also Known As: Retinol Test

The Vitamin B12 Micronutrient Test measures blood levels of vitamin B12, essential for red blood cell production, nerve health, and DNA synthesis. Deficiency can cause anemia, fatigue, neurological issues, and cognitive changes. This test helps identify dietary deficiencies, absorption problems, or related health conditions, supporting diagnosis and ongoing management of overall wellness.

Patient must be 18 years of age or older.
: Serum
Also Known As: B12 Test, Cobalamin Test

Most Popular

The Vitamin B12 Test measures cobalamin levels in blood to evaluate nutritional health, red blood cell production, and nervous system function. Low B12 can cause anemia, fatigue, weakness, memory problems, and nerve damage, while high levels may indicate liver or kidney disease. Doctors use this test to detect B12 deficiency, monitor treatment, and assess malabsorption conditions like pernicious anemia, Crohn’s disease, or celiac disease.

: Serum
Also Known As: B12 Test, Cobalamin Test

The Vitamin B12 and Folate Panel Test measures blood levels of vitamin B12 and folate to evaluate nutritional status, red blood cell production, and nervous system health. Deficiencies may cause anemia, fatigue, weakness, neuropathy, or cognitive decline, while elevated levels can indicate liver or kidney disease. Doctors use this panel to diagnose deficiency, monitor therapy, and assess absorption disorders such as pernicious anemia, Crohn’s disease, or celiac disease.

: Serum
Also Known As: Cobalamin and Folic Acid Test, Vitamin B12 and Vitamin B9 Test

The Vitamin D 1,25-Dihydroxy Test measures the active form of vitamin D in blood to evaluate calcium and phosphorus balance, bone health, and kidney function. Abnormal levels may indicate kidney disease, parathyroid disorders, or problems with calcium metabolism. Doctors order this test when deficiency symptoms don’t match 25-hydroxy vitamin D results or to monitor chronic illness. Results provide vital insight into vitamin D activity, mineral health, and metabolic function.

: Serum
Also Known As: Calcitriol Test

The Vitamin D 25-Hydroxy Total Test measures levels of 25-hydroxyvitamin D in blood to evaluate vitamin D status, bone health, and calcium balance. It helps detect deficiency, insufficiency, or toxicity, which can affect immune function, muscle strength, and risk of osteoporosis. Doctors use this test to assess overall nutritional health, monitor supplementation, and support diagnosis of metabolic or endocrine disorders linked to vitamin D.

: Serum
Also Known As: 25-hydroxyvitamin D Test, Vitamin D 25-OH Test, Total 25-OH D Test

The QuestAssureD™ Vitamin D 25-Hydroxy Total Test measures Vitamin D2, Vitamin D3, and total 25-hydroxy vitamin D to assess overall vitamin D status. Adequate vitamin D supports bone strength, calcium absorption, immune health, and muscle function. Low levels may cause osteoporosis, weakness, or increased disease risk, while high levels can indicate toxicity. Doctors use this test to diagnose deficiency, monitor supplementation, and evaluate metabolic and endocrine health.

: Serum
Also Known As: Vitamin D Test, Ergocalciferol Test, Vitamin D2 Test, Cholecalciferol Test, Vitamin D3 Test, Calcidiol Test, 25-hydroxyvitamin D Test, Calcifidiol Test, 25-hydroxy-vitamin D Test, Vitamin D Total Test

The Vitamin E Micronutrient Test measures blood levels of vitamin E to assess antioxidant status and detect deficiencies or excess. Vitamin E protects cells from oxidative damage, supports immune function, and promotes cardiovascular and neurological health. This test helps identify poor dietary intake, absorption issues, or toxicity from supplements, aiding in diagnosis and management of overall wellness.

Patient must be 18 years of age or older.
: Serum
Also Known As: Tocopherol Test

The Vitamin E Test measures blood levels of vitamin E, a fat-soluble antioxidant essential for protecting cells, supporting immunity, and maintaining nerve and muscle health. Low levels may result from poor diet, malabsorption, or liver disease, leading to weakness or vision problems. High levels can occur with excessive supplementation. Doctors order this test to assess nutritional status, monitor chronic illness, or guide therapy for deficiency or toxicity.

: Serum
Also Known As: Tocopherol Test

The Vitamin K Test measures blood levels of vitamin K, a nutrient essential for blood clotting, bone strength, and heart health. Deficiency may cause easy bruising, excessive bleeding, or weakened bones, and can result from poor diet, liver disease, or malabsorption. Doctors order this test to investigate clotting problems, monitor anticoagulant therapy, or assess nutritional status. Results help guide treatment, supplementation, and long-term health management.

: Plasma-Unspecified Vial Pour

The White Blood Cell Count with Differential Test measures total white blood cells and breaks them into types, including neutrophils, lymphocytes, monocytes, eosinophils, and basophils. Doctors order this test to evaluate infections, inflammation, immune disorders, and blood cancers. Abnormal results may suggest bacterial or viral infections, allergies, or leukemia. Results provide key insight into immune system health, disease detection, and treatment monitoring.

: Blood
Also Known As: WBC Test, Leukocyte Test, Leukocyte Differential Test, Blood Differential Test, Diff Test, Peripheral Differential Test

The Zinc Micronutrient Test measures blood zinc levels to evaluate nutritional status and detect deficiencies or excess. Zinc is vital for immune function, wound healing, growth, reproduction, and enzyme activity. This test helps identify poor intake, malabsorption, or excessive supplementation, supporting diagnosis and management of overall health, immune balance, and metabolic function.

Patient must be 18 years of age or older.
: Plasma-Unspecified Vial Pour
Also Known As: Zinc Plasma Test

Most Popular

The Zinc Test measures zinc levels in blood to evaluate nutritional status and overall health. Zinc is essential for immune function, wound healing, growth, taste, and reproductive health. Abnormal levels may cause fatigue, hair loss, delayed healing, or increased infection risk. Doctors use this test to detect zinc deficiency or excess, monitor supplementation, and guide treatment for conditions linked to immune, metabolic, or endocrine imbalance.

: Plasma-Unspecified Vial Pour
Also Known As:  Zinc Plasma Test, Zn Test

The FIT Test (Fecal Immunochemical Test) detects hidden blood in the stool, which may indicate gastrointestinal bleeding. It is commonly used to screen for colorectal cancer and other digestive tract conditions by identifying blood that is not visible to the eye.

: Varied

: Serum
Also Known As: ANA Test, ANA Screen IFA with Reflex to Titer and pattern IFA Test, ANA with Reflex Test, Antinuclear Antibody Screen Test

: Serum, Blood, Random

: Blood, Serum

: Serum, Stool/Feces, Blood

: Serum, Blood




: Plasma-Unspecified Vial Pour, Serum

: Other

: Blood, Plasma-Unspecified Vial Pour, Serum

People tend to overlook their digestive health. With so much focus on cancer, heart attacks, and strokes, it's easy for your gut health to get lost in the shuffle. 

That's why it's vital to have digestive lab tests done regularly. Catching digestive system conditions before they start is the best way to treat them. 

If monitoring your gut health is new to you, don't worry. In this article, we're going to cover everything you need to know about your gut.  

Digestive System Conditions 

There are different kinds of gastrointestinal lab tests to monitor different enzymes and bacteria in your gut. The bacteria in your gut is known as "good bacteria." These bacteria need to maintain their presence in your stomach for the system to remain healthy in the long run. An unhealthy digestive system can give rise to the following conditions.

Celiac Disease 

This is an acute gluten sensitivity ... See more