Description
Understand the Value of an LFT (Liver Function Test)
A Liver Function Test (LFT) is a crucial diagnostic tool that assesses the health and performance of your liver. The liver plays a central role in digestion, detoxification, and metabolism. By measuring enzymes, proteins, and substances produced or processed by the liver, the LFT helps identify inflammation, infections, liver damage, or disorders such as hepatitis, fatty liver, or cirrhosis.
This test is often recommended for routine health screening, if you have symptoms like jaundice or fatigue, or if you take medications that can affect liver health.
Breakdown of the LFT Components
The LFT panel typically includes:
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Alanine Aminotransferase (ALT): Elevated ALT levels may indicate liver inflammation or injury, often seen in hepatitis or alcohol-related damage.
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Aspartate Aminotransferase (AST): Works with ALT to assess liver damage. High levels can also reflect muscle or heart issues.
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Alkaline Phosphatase (ALP): Increased ALP levels may suggest bile duct obstruction, liver diseases, or bone disorders.
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Bilirubin (Total and Direct): Bilirubin is a waste product from red blood cells. High levels can cause jaundice and suggest liver dysfunction or bile duct blockage.
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Albumin: This protein is made by the liver. Low levels can point to liver disease or poor nutrition.
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Total Protein: Measures overall protein in the blood; imbalances may indicate liver or kidney issues.
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Gamma-Glutamyl Transferase (GGT) (optional in some panels): Often used to detect alcohol-related liver damage or bile duct issues.
Reference Ranges for a Healthy LFT
Note: Ranges may vary slightly depending on the lab.
| Parameter | Normal Range |
|---|---|
| ALT (SGPT) | 7–56 U/L |
| AST (SGOT) | 5–40 U/L |
| ALP | 44–147 U/L |
| Total Bilirubin | 0.1–1.2 mg/dL |
| Direct Bilirubin | 0.0–0.3 mg/dL |
| Albumin | 3.5–5.0 g/dL |
| Total Protein | 6.3–7.9 g/dL |
| GGT (if tested) | 9–48 U/L |
Why Choose a Timely LFT?
Early detection of liver-related problems can prevent complications. An LFT not only helps in diagnosing current issues but also monitors the effect of ongoing treatments or medications. It’s especially useful for:
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Monitoring long-term medication use
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Assessing alcohol-related damage
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Evaluating symptoms like fatigue, nausea, or yellowing of skin
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Managing chronic liver diseases
Stay Proactive with Liver Health
Regular LFT screening helps protect one of your body’s most vital organs. If any values are outside the reference range, consult your physician for further evaluation and treatment options. A healthy liver means a healthier you!
Notes
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Reference ranges can slightly vary based on lab standards, age, and altitude.
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Always interpret values in consultation with a qualified physician.
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