All Digestive System Tests

The Total Immunoglobulins Panel measures IgA, IgG, and IgM levels to evaluate immune system function. Abnormal results may indicate immune deficiency, chronic infections, autoimmune disorders, or certain blood cancers. IgA helps protect mucous membranes, IgG provides long-term defense, and IgM is the body’s first response to infection. Doctors use this blood test to diagnose, monitor, and manage immune-related conditions and overall immune health.

The Transferrin Test measures transferrin, a blood protein that transports iron, to evaluate iron status and nutritional health. High levels may suggest iron deficiency anemia, while low levels may indicate liver disease, malnutrition, or chronic illness. Doctors use this test alongside iron and TIBC to investigate fatigue, weakness, or anemia symptoms. Results provide vital insight into iron balance, red blood cell production, and overall metabolic function.

The Thyroid Stimulating Hormone (TSH) Test measures TSH levels in blood to assess thyroid function and diagnose hypothyroidism or hyperthyroidism. It evaluates how the thyroid controls metabolism, energy, weight, and heart rate. Doctors use the TSH test to investigate symptoms such as fatigue, hair loss, or mood changes. Frequently included in routine health exams, it is also key for monitoring thyroid disease treatment and overall endocrine balance.

The Tissue Transglutaminase (tTG) IgA Antibody Test screens for celiac disease by detecting IgA antibodies against tissue transglutaminase, a marker of gluten intolerance. Elevated levels suggest an autoimmune reaction that damages the small intestine. Doctors order this test for patients with chronic diarrhea, bloating, weight loss, or anemia. Results provide critical insight for diagnosing celiac disease and guiding gluten-free diet management.

The Tissue Transglutaminase (tTG) IgG Antibody Test helps diagnose celiac disease in patients with IgA deficiency by detecting IgG antibodies against tissue transglutaminase. Elevated levels suggest an autoimmune reaction to gluten that damages the small intestine, leading to malabsorption, diarrhea, or anemia. Doctors order this test to confirm gluten intolerance, support diagnosis of celiac disease, and monitor adherence to a gluten-free diet.

The Tissue Transglutaminase IgG IgA Antibodies Test detects both IgG and IgA antibodies to tissue transglutaminase, which are commonly elevated in celiac disease. It helps screen for and diagnose celiac disease by identifying an immune response to gluten and may also be used to monitor treatment and dietary adherence.

The Uric Acid Test measures uric acid levels in blood to assess kidney function and detect gout, a form of arthritis caused by uric acid buildup. High levels may also signal kidney disease, kidney stones, or metabolic disorders, while low levels can occur with liver disease. Doctors use this test to investigate joint pain, swelling, or frequent urination, and to monitor treatment for gout, kidney stones, or chemotherapy-related complications.

The Vasoactive Intestinal Polypeptide Test evaluates VIP levels in the blood, helping identify abnormal hormone activity linked to gastrointestinal function. High VIP levels may suggest VIPoma, watery diarrhea syndrome, or pancreatic endocrine tumors, while abnormal results may point to hormonal imbalances. By assessing this peptide, the test supports diagnosis of rare neuroendocrine conditions and disorders affecting digestion and fluid regulation.

The Vitamin A Micronutrient Test measures blood levels of vitamin A (retinol) to assess nutritional status and detect deficiencies or excesses. Adequate vitamin A is essential for vision, immune defense, reproduction, and cellular health. This test helps evaluate malnutrition, absorption issues, or toxicity from supplements, supporting diagnosis and monitoring of overall health.

Patient must be 18 years of age or older.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.