LKS Substrate (AMA, SMA, LKM), in Chennai

Fasting and dietary instructions:

No fasting required. Eat and drink normally before the appointment. Stay well hydrated , drink 2 to 3 glasses of water before the draw. Avoid alcohol and vigorous exercise for 12 hours before collection.

Medication guidance:

Continue all regularly prescribed medication unless your doctor has specifically instructed otherwise. Inform lab staff about all prescription drugs, supplements, herbal preparations, and protein powders you are taking.

What to bring:

Carry your doctor's test order, a government-issued photo ID, and your OPD insurance card. If you have had this test before, bring previous reports , your doctor can compare results over time.

Timing:

Book the earliest available morning slot. For fasting tests, an overnight fast followed by a morning draw represents the optimal balance between adequate fasting duration and test accuracy.

AMA (anti-mitochondrial antibody), SMA (anti-smooth muscle antibody), LKM (anti–liver/kidney microsomal antibody)

When does a doctor order LKS Substrate (AMA, SMA, LKM)?

Doctors order LKS Substrate (AMA, SMA, LKM) when a patient reports jaundice, dark urine, pale stools, persistent fatigue, nausea, or upper right abdominal pain. It is also routinely ordered before starting hepatotoxic medications (statins, anti-TB drugs, anticonvulsants) and periodically during their use.

Who should get LKS Substrate (AMA, SMA, LKM) done in Chennai?

Hepatitis B prevalence in Tamil Nadu is estimated at around 3 to 4%. NAFLD is also rising rapidly among Chennai's large young professional population due to sedentary IT-sector jobs, high-carbohydrate diets, and rising obesity rates in areas like OMR and T Nagar. LKS Substrate (AMA, SMA, LKM) is used as an autoimmune liver antibody panel. Doctors order it when patients have abnormal liver blood tests, jaundice, fatigue, itching, or unexplained liver inflammation. NAFLD affects an estimated 25 to 35% of India's urban adults , the majority unaware. Regular liver testing in Chennai's residential areas including Adyar and Porur enables lifestyle intervention before irreversible scarring occurs. Patients recovering from hepatitis, those in alcohol recovery, and anyone with persistently unexplained fatigue also benefit from regular liver monitoring.

What conditions can LKS Substrate (AMA, SMA, LKM) help diagnose?

Very high ALT and AST (10–50× normal) with normal ALP suggests acute hepatocellular injury , viral hepatitis, drug toxicity, or ischaemia. Predominantly elevated ALP and GGT with modest transaminases suggests bile duct obstruction or primary biliary cholangitis. An AST:ALT ratio above 2 suggests alcoholic hepatitis. Persistently low albumin with elevated bilirubin indicates advanced cirrhosis.

What do LKS Substrate (AMA, SMA, LKM) results mean?

ALT above 56 U/L or AST above 40 U/L signals hepatocyte stress. The pattern matters: ALT greater than AST typically suggests NAFLD or viral hepatitis. An AST:ALT ratio above 2 points to alcoholic hepatitis. High ALP with normal transaminases suggests bile duct disease rather than liver cell damage. Low albumin alongside high bilirubin indicates serious loss of liver function.

How often should LKS Substrate (AMA, SMA, LKM) be repeated?

Adults with no liver risk factors and a previously normal result: annually. Patients with NAFLD or treated hepatitis: every 6 months. Patients on hepatotoxic medication: baseline before starting, then at 1 month, 3 months, and every 6 months during treatment. Patients with active liver disease: at intervals specified by their gastroenterologist.

What happens after LKS Substrate (AMA, SMA, LKM) results are ready?

Book a follow-up consultation after reviewing your results. GetVisit stores your reports alongside your previous test history, so your doctor sees your full health trend , not just today's snapshot. This longitudinal context significantly improves the clinical value of each repeat test.