Doctor's Assessment Included
Every result includes a professional assessment from a BIG-registered doctor. For treatment decisions, discuss your results with your GP.
Smooth Muscle Antibodies (SMA)
Smooth Muscle Antibodies (SMA) are autoantibodies associated with autoimmune hepatitis. Women are more frequently affected by autoimmune hepatitis than men, and hormonal factors may influence disease development, making liver immune health an important area of attention for women.
What It Measures
This test detects the presence and level of smooth muscle antibodies in your blood. SMA targets proteins in smooth muscle tissue and is a key diagnostic marker for autoimmune hepatitis type 1.
Why It Matters
Detecting SMA can help identify autoimmune hepatitis, which requires timely treatment to prevent liver damage. SMA may also be associated with primary biliary cholangitis and other liver conditions. Early identification supports better long-term liver health outcomes.
When to Test
Testing may be recommended when liver enzyme levels are elevated without a clear cause, when symptoms of liver disease are present, or as part of an autoimmune liver disease workup. Consult a healthcare professional for interpretation of results.
Symptoms
Low Levels
Absence of smooth muscle antibodies is not typically associated with specific symptoms and is generally considered within the reference range
High Levels
Fatigue, abdominal discomfort in the upper right area, jaundice (yellowing of skin and eyes), dark urine, unexplained joint pain, loss of appetite, nausea
Lifestyle Tips
Supporting liver health through a balanced diet, limited alcohol consumption, and maintaining a healthy weight can be beneficial. Avoiding unnecessary medications that may stress the liver is also recommended. Regular medical check-ups can help monitor liver function over time.
Frequently Asked Questions
What is autoimmune hepatitis?
Autoimmune hepatitis is a chronic condition in which the immune system attacks liver cells, causing inflammation. If left untreated, it can lead to serious liver damage. SMA testing is one of the key tools used in its diagnosis.
Can SMA be positive without liver disease?
In rare cases, low levels of SMA can be detected in individuals without liver disease, or in those with other autoimmune conditions. A healthcare professional will consider the full clinical picture when interpreting results.
Is autoimmune hepatitis treatable?
Autoimmune hepatitis can often be managed effectively with medication that suppresses the overactive immune response. Early diagnosis and treatment are important for preventing liver damage. Your healthcare provider will determine the best approach for your situation.