Functional Lab Testing

Blood calcium test measures calcium levels to help assess metabolism, nerve and muscle function, and parathyroid or kidney-related imbalance status overall.

Calcium-to-albumin ratio adjusts calcium for albumin binding to help assess true calcium status accurately and support evaluation of metabolic or kidney issues.

Calcium-to-phosphorus ratio measures mineral balance to help assess bone metabolism, vitamin D status, and parathyroid or kidney dysfunction patterns overall.

Stool calprotectin measures intestinal inflammation to help assess IBD activity and support distinguishing Crohn’s or colitis from IBS when symptoms persist.

CA-125 measures a blood protein to help monitor ovarian cancer treatment response and support follow-up when symptoms or risk factors are present and change.

Candida albicans germ tube antibody test detects immune response to Candida to help assess invasive infection risk in immunocompromised patients early in care.

Candida antibodies test measures immune response to Candida species to help assess current or prior fungal exposure and support workup of persistent symptoms.

Capsule endoscopy uses a small camera capsule to image the small intestine and help assess bleeding, inflammation, or lesions when other tests are unclear.

Bicarbonate (carbon dioxide) blood test measures acid–base balance to help assess metabolic acidosis or alkalosis and support kidney or lung evaluation quickly.

Cardiopulmonary exercise testing (CPET) measures oxygen use and ventilation during exercise to help assess exercise intolerance and guide rehab planning safely.

Carnitine test measures blood or urine carnitine to help assess fat-energy metabolism, deficiency states, and inherited metabolic disorders in evaluation.

Catecholamine blood test measures adrenaline, noradrenaline, and dopamine to help assess adrenal hormone excess and support tumor workup in hypertension cases.

24-Hour Urine Catecholamines measures stress hormones excreted over a full day to help assess adrenal hormone excess and guide pheochromocytoma evaluation.

Ceruloplasmin measures a liver-made copper-carrying protein to help assess copper metabolism, Wilson’s risk, liver function, and inflammation context as needed.

Child Attention Profile (CAP) questionnaire helps assess attention, impulse control, and behavior across settings to support ADHD evaluation and track progress.

Child Behavior Checklist (CBCL) helps assess behavioral patterns, including anxiety, attention issues, and aggression, to support screening and care planning.

Chloride test measures electrolyte balance to help assess hydration, acid–base status, and kidney function, supporting evaluation of weakness or confusion.

Choline test measures blood choline to assess liver fat transport and methylation-related nutrient status, guiding diet or supplement planning for metabolic balance.

Chromium test measures chromium in blood or urine to assess deficiency or exposure and support evaluation of glucose regulation and insulin sensitivity patterns.

Citrulline test measures blood citrulline to assess small-intestine absorptive capacity and urea cycle function, guiding workup of GI or fatigue patterns.

Clinical Attachment Level (CAL) measures gum attachment loss and pocket depth to stage periodontitis severity and guide care that protects tooth support.

Coagulation Factor VIII test measures factor VIII level or activity to assess hemophilia A or acquired deficiency and guide safe procedures or surgery.

Coenzyme Q10 (CoQ10) test measures blood CoQ10 to assess mitochondrial cofactor status and oxidative load, useful with statins or cardiac symptoms.

Colonic Transit Study tracks marker movement through the colon to differentiate slow-transit vs outlet delay constipation and guide targeted bowel care.

Colonoscopy visualizes the colon and rectum to screen for polyps and cancer risk and evaluate bleeding, anemia, inflammation, or bowel habit changes.

Color vision test screens color discrimination to assess inherited or acquired deficits and support driving, workplace safety, and daily accommodations.

Complement C3 test measures C3 to evaluate immune activity and complement consumption, supporting workup of lupus, infection, or kidney inflammation.

Complement C4 test measures C4 to evaluate classical pathway activity, supporting workup of lupus flares or hereditary/acquired angioedema patterns.