Alkaline Phosphatase Isoenzymes Test

Alkaline phosphatase (ALP) is an enzyme found in bones, liver, and intestines. It plays a role in bone formation and bile production. This test measures ALP levels to assess bone metabolism and liver function. Elevated ALP can indicate bone disease (osteoporosis, fractures, or Paget's disease), liver disease, or bile duct obstruction. Low levels are less common but may suggest nutritional deficiencies or genetic conditions. ALP is often part of routine health screening or organ function assessment.

Alkaline phosphatase (ALP) is an enzyme produced mainly by the liver and bones. This test specifically measures liver-derived ALP through a heat stability method, helping distinguish liver ALP from bone ALP. Elevated liver ALP may indicate liver disease, gallstones, or cholestasis. This specialized test helps pinpoint the organ source of elevated ALP results.

Alkaline phosphatase (ALP) is an enzyme produced by bone cells during bone formation and remodeling. Bone-specific ALP helps distinguish bone turnover from liver-related enzyme elevation. Elevated bone ALP may indicate increased bone formation, bone disease, fractures healing, or metabolic bone conditions like osteoporosis or Paget's disease. This test is useful for monitoring bone health and assessing response to bone therapies.

Placental alkaline phosphatase (ALP) is an enzyme produced by the placenta during pregnancy. This test measures ALP levels in blood and is primarily used in obstetric care to assess placental function and fetal well-being during pregnancy. Elevated levels may indicate placental problems, while decreasing levels in late pregnancy may suggest placental aging or dysfunction. This test provides important information about pregnancy health and fetal development.

Intestinal alkaline phosphatase (ALP) is an enzyme produced by the intestinal lining that plays a role in nutrient absorption and intestinal barrier function. Elevated intestinal ALP levels may indicate intestinal inflammation, increased intestinal permeability, or certain metabolic conditions. This qualitative test detects the presence or absence of intestinal ALP. Abnormal results may be associated with inflammatory bowel disease, celiac disease, or other gastrointestinal conditions.

This test measures the fraction of alkaline phosphatase (ALP) enzyme that comes from macrophages in the liver—a specific subtype called macrohepatic ALP. When expressed as a ratio to total ALP, it helps identify the source of elevated alkaline phosphatase. Elevated macrohepatic ALP may indicate liver disease, cirrhosis, or chronic inflammatory liver conditions. This specialized test provides diagnostic detail beyond routine ALP testing and helps differentiate liver disorders from other conditions causing ALP elevation.