Why Is the Liver Called the Silent Worker?
The liver is one of the hardest-working organs in the human body. It performs more than 500 vital functions every day, including detoxification, metabolism, protein synthesis, digestion, and storage of nutrients. Surprisingly, the liver can continue functioning even when partially damaged, which is why many liver diseases remain unnoticed until significant damage has occurred.
Understanding liver health and interpreting liver function tests (LFTs) can help detect problems early and prevent long-term complications.
What Are Liver Function Tests (LFTs)?
Liver Function Tests are a group of blood tests used to evaluate the health and functioning of the liver.
Common LFT parameters include:
- Serum Bilirubin (Direct and Indirect)
- SGOT (AST)
- SGPT (ALT)
- GGT (Gamma Glutamyl Transferase)
- Alkaline Phosphatase (ALP)
- PT/INR and aPTT
- Serum Proteins (Albumin and Globulin)
These tests help doctors identify liver inflammation, infections, fatty liver disease, cirrhosis, bile duct obstruction, and liver failure.
Understanding Bilirubin: Why Does Jaundice Occur?
Bilirubin is produced when old red blood cells break down.
Normally:
- The liver converts insoluble indirect bilirubin into soluble direct bilirubin.
- This converted bilirubin is then eliminated from the body.
When the liver becomes diseased or inflamed, bilirubin levels rise, causing jaundice (yellow discoloration of the eyes and skin).
Causes of Increased Indirect (Unconjugated) Bilirubin
- Hemolytic anemia
- Malaria
- Excessive destruction of red blood cells
- Defective bilirubin metabolism
- Cirrhosis
Causes of Increased Direct (Conjugated) Bilirubin
- Viral hepatitis
- Liver inflammation
- Hepatocellular injury
- Bile flow obstruction
SGPT (ALT): The Most Specific Marker of Liver Damage
SGPT (Alanine Aminotransferase) is primarily found in liver cells.
Elevated SGPT levels may indicate:
- Fatty liver disease
- Viral hepatitis
- Drug-induced liver injury
- Alcohol-related liver disease
Normal Range: 7–56 U/L
Since SGPT is highly concentrated in the liver, it is considered one of the most reliable indicators of liver cell damage.
SGOT (AST): Not Always a Liver Problem
SGOT is found in multiple organs including:
- Liver
- Heart
- Muscles
Elevated SGOT can occur due to:
- Liver disease
- Heart attack
- Muscle injury
- Intense exercise
Normal Range: 5–40 U/L
When SGOT is elevated but SGPT remains normal, the cause may be outside the liver.
SGOT/SGPT Ratio: A Valuable Diagnostic Clue
Doctors often compare SGOT and SGPT levels.
SGOT/SGPT Ratio Above 2
May indicate:
- Alcoholic Liver Disease (ALD)
- Early Chronic Liver Disease (CLD)
SGOT/SGPT Ratio Above 5
May suggest:
- Kidney disease
- Heart disease
- Lymphoma
- Bone disorders
This ratio helps differentiate liver disorders from other systemic illnesses.
GGT: The Alcohol Marker
Gamma Glutamyl Transferase (GGT) is useful for:
- Detecting bile duct obstruction
- Assessing liver damage
- Monitoring alcohol-related liver disease
A disproportionately high GGT level often suggests alcohol-induced liver injury.
Alkaline Phosphatase (ALP): Liver or Bone Disease?
ALP is found in:
- Liver
- Bile ducts
- Bones
Raised ALP levels can indicate:
Liver Causes
- Gallstones
- Bile duct obstruction
- Hepatitis
- Cirrhosis
Bone Causes
- Vitamin D deficiency
- Healing fractures
- Bone tumors
- Paget’s disease
Normal Range: 40–130 U/L
PT, INR and aPTT: Measuring Liver’s Protein-Producing Capacity
The liver produces most clotting factors responsible for blood coagulation.
Advanced liver diseases such as cirrhosis may cause:
- Increased PT
- Increased INR
- Increased aPTT
These tests help assess the severity of liver dysfunction.
Serum Proteins and Liver Health
The liver synthesizes albumin and other proteins essential for maintaining fluid balance.
Low protein levels may result in:
- Swelling of feet
- Generalized edema
- Ascites
Reduced protein production is commonly seen in chronic liver disease and cirrhosis.
Fatty Liver Disease: The Modern Epidemic
Fatty Liver Disease is becoming increasingly common due to:
- Obesity
- Insulin resistance
- Diabetes
- Hormonal imbalance
- Sedentary lifestyle
Common Symptoms
- Fatigue
- Bloating
- Heaviness in the right upper abdomen
- Elevated liver enzymes
Lifestyle Measures
- Weight reduction
- Regular exercise
- Dietary modification
- Blood sugar control
Early intervention can reverse fatty liver before permanent damage occurs.
Imaging Tests Used in Liver Disease
To evaluate liver structure and damage, doctors may recommend:
- Ultrasound (USG)
- CT Scan
- MRI
- FibroScan
These investigations help assess fatty liver, fibrosis, cirrhosis, and liver tumors.
Homeopathic Medicines Commonly Used in Liver Disorders
Homeopathy aims to support the body’s healing response while addressing the individual’s symptom picture.
Frequently used remedies include:
Chelidonium Majus
Often considered in:
- Jaundice
- Hepatitis
- Obstructive liver conditions
Chionanthus
Commonly used in:
- Liver disorders associated with gallbladder dysfunction
- Pancreatic involvement
China Officinalis
Helpful in:
- Hepatitis with weakness
- Flatulence
- Loss of appetite
Myrica Cerifera
Traditionally used in:
- Severe jaundice
- Advanced liver dysfunction
Phyllanthus Niruri
Popular herbal support for:
- Fatty liver disease
- Liver protection
- Detoxification
Carduus Marianus
Frequently considered in:
- Chronic liver disease
- Portal hypertension
- Enlarged liver
Phosphorus
Traditionally used in:
- Fatty degeneration of the liver
- Various chronic liver complaints
When Should You Get Your Liver Tested?
You should consider a liver evaluation if you experience:
- Persistent fatigue
- Yellow eyes or skin
- Abdominal swelling
- Unexplained weight loss
- Dark urine
- Alcohol dependence
- Obesity or diabetes
- Long-term medication use
Early detection significantly improves treatment outcomes.
Final Thoughts
The liver silently performs life-sustaining functions every second. Unfortunately, liver diseases often progress unnoticed until advanced stages. Regular health checkups, timely liver function testing, healthy lifestyle habits, and appropriate medical care can help preserve liver health and prevent serious complications.
If you have abnormal liver function tests, persistent digestive complaints, fatty liver disease, or jaundice, seek professional medical evaluation at the earliest opportunity. Early intervention can make a significant difference in long-term liver health.