A blood test is a common medical procedure that involves drawing a sample of blood from a vein in your arm. Blood tests are used to measure various substances in your blood, including:
- Blood cells: Red blood cells, white blood cells, and platelets.
- Electrolytes: Sodium, potassium, chloride, and bicarbonate.
- Enzymes: Liver enzymes, cardiac enzymes, and others.
- Hormones: Thyroid hormones, sex hormones, and others.
- Glucose: Blood sugar levels.
- Proteins: Albumin, globulins, and others.
- Vitamins and minerals: Iron, vitamin B12, vitamin D, and others.
- Drugs: Prescription medications, illegal drugs, and over-the-counter medications.
- Antibodies: To detect infections or autoimmune diseases
