Medical biochemistry evaluates chemical components in blood, urine and other biological specimens to assess metabolic function. These laboratory tests help clinicians screen, monitor and guide investigations; results should be interpreted alongside clinical findings.
Common tests and what they measure
Typical biochemistry panels include electrolytes (sodium, potassium), glucose and HbA1c for glycemic control, kidney markers (creatinine, urea), liver enzymes (AST, ALT, ALP), lipid profile (cholesterol, triglycerides), total protein and albumin, hormone assays and inflammatory markers such as CRP. Each marker gives information about specific organs or metabolic pathways.
How results are interpreted
Laboratories report values with reference ranges that vary by population, age and sex. A single abnormal value does not always indicate disease; medications, recent meals, exercise and chronic conditions can affect results. Clinicians integrate lab data with symptoms, history and other tests to decide next steps.
Preparing samples and pre-analytic tips
Pre-analytic factors strongly influence accuracy. Some tests require fasting (for example fasting glucose or lipid profile typically 8–12 hours), while others do not. Stay hydrated unless instructed otherwise. Tell your provider about prescription or over‑the‑counter medications and supplements before sampling. Use the lab’s instructions for sample type and timing (serum vs plasma, first‑void urine, etc.).
Which specialist should I see?
Primary care (family medicine/internal medicine) usually reviews initial abnormal results. Depending on findings, referral may be appropriate to gastroenterology for liver abnormalities, nephrology for kidney dysfunction, endocrinology for hormonal disorders, or infectious disease specialists for infection‑related markers. Your clinician will recommend the most relevant specialty based on the overall picture.
When lab findings may signal urgency
Certain combinations of symptoms and lab abnormalities can indicate urgent problems. If you experience severe chest pain, sudden breathlessness, fainting, sudden confusion, intense abdominal pain or signs of severe dehydration, seek emergency care immediately. Lab numbers alone are not a substitute for urgent evaluation when serious symptoms are present.