Liver Disease: Symptoms, Causes & Prevention

# **Liver Function Test (LFT): Purpose, Parameters, Liver Diseases & Diet for Better Liver Health**

**Author:** Sonu Singh
**Category:** Health, Diagnostics, Preventive Care

## **Introduction**

The liver is one of the most vital organs in the human body. It performs more than 500 essential functions, including detoxification, digestion, metabolism, and storage of nutrients.
A **Liver Function Test (LFT)** is a blood test that helps evaluate how well your liver is working and detects liver damage or disease at an early stage.

In this article, we’ll cover:

* What is a Liver Function Test?
* Common questions related to LFT
* Each LFT parameter explained
* Liver diseases linked to abnormal LFT
* Diet precautions for maintaining liver health
* Best green vegetables for a healthy liver

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## **What is a Liver Function Test (LFT)?**

A **Liver Function Test** is a group of blood tests that measure enzymes, proteins, and substances produced or processed by the liver.
It helps doctors assess:

* Liver inflammation
* Liver infection
* Liver damage
* Bile duct obstruction
* Overall liver performance

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## **Common General Queries About Liver Function Test**

* Why is my doctor advising an LFT?
* Is LFT done on an empty stomach?
* Can fatty liver be detected by LFT?
* What happens if LFT values are high?
* Can liver disease exist even with normal LFT?

👉 LFT is often recommended for people with fatigue, jaundice, abdominal pain, obesity, alcohol use, diabetes, or long-term medication intake.

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## **Liver Function Test Parameters Explained**

### **1. SGOT (AST – Aspartate Aminotransferase)**

**Normal Range:** 5–40 U/L

* Found in liver, heart, and muscles
* Elevated levels indicate liver injury, hepatitis, or muscle damage

### **2. SGPT (ALT – Alanine Aminotransferase)**

**Normal Range:** 5–45 U/L

* More specific to the liver
* High levels suggest liver inflammation, fatty liver, or hepatitis

### **3. Alkaline Phosphatase (ALP)**

**Normal Range:** 44–147 IU/L

* Related to bile ducts
* Raised in bile obstruction, gallstones, liver tumors

### **4. Total Bilirubin**

**Normal Range:** 0.3–1.2 mg/dL

* Produced from red blood cell breakdown
* High bilirubin causes jaundice (yellow eyes and skin)

### **5. Direct (Conjugated) Bilirubin**

* Indicates liver’s ability to process bilirubin
* Elevated in hepatitis and bile duct blockage

### **6. Indirect (Unconjugated) Bilirubin**

* Increased in hemolytic anemia and liver dysfunction

### **7. Total Protein**

**Normal Range:** 6.0–8.3 g/dL

* Reflects nutrition and liver’s synthetic function

### **8. Albumin**

**Normal Range:** 3.5–5.5 g/dL

* Maintains fluid balance
* Low levels suggest chronic liver disease or cirrhosis

### **9. Globulin**

* Important for immunity
* Increased in chronic liver inflammation

### **10. A/G Ratio (Albumin/Globulin Ratio)**

* Altered in liver cirrhosis and chronic infections

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## **Diseases Related to Abnormal Liver Function Test**

### **1. Fatty Liver Disease**

* Mild to moderate increase in ALT and AST
* Common in obesity, diabetes, and alcohol use

### **2. Hepatitis (A, B, C, E)**

* Very high SGPT and SGOT
* Bilirubin may also increase

### **3. Liver Cirrhosis**

* Low albumin
* High bilirubin
* Altered A/G ratio

### **4. Alcoholic Liver Disease**

* AST higher than ALT (AST:ALT > 2:1)

### **5. Jaundice**

* Increased bilirubin levels

### **6. Bile Duct Obstruction**

* High ALP and direct bilirubin

### **7. Liver Cancer**

* Severely abnormal LFT values in advanced stages

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## **Dietary Precautions for Maintaining Liver Health**

### **Foods to Avoid**

❌ Fried and oily foods
❌ Excess sugar and sweets
❌ Alcohol (most harmful)
❌ Processed and junk foods
❌ Excess salt

### **Foods to Include**

✅ Fresh fruits
✅ Whole grains
✅ Lean protein (dal, pulses, fish)
✅ Adequate water intake
✅ Home-cooked meals

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## **Best Green Vegetables for Good Liver Health**

### **1. Spinach (Palak)**

* Rich in antioxidants
* Helps detoxification

### **2. Broccoli**

* Improves liver enzyme function
* Reduces fatty liver risk

### **3. Fenugreek Leaves (Methi)**

* Controls fat accumulation
* Supports liver metabolism

### **4. Bottle Gourd (Lauki)**

* Light, hydrating, easy to digest
* Reduces liver load

### **5. Bitter Gourd (Karela)**

* Enhances bile secretion
* Supports liver cleansing

### **6. Coriander Leaves**

* Helps remove toxins
* Improves digestion

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## **Lifestyle Tips for a Healthy Liver**

✔️ Maintain healthy weight
✔️ Exercise regularly
✔️ Avoid self-medication
✔️ Get regular liver tests
✔️ Vaccination for Hepatitis A & B

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## **Conclusion**

The **Liver Function Test** is a powerful diagnostic tool that helps detect liver problems early—even before symptoms appear. Understanding your LFT parameters, maintaining a liver-friendly diet, and following a healthy lifestyle can significantly reduce the risk of liver disease.

A healthy liver means a healthier life. 💚

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Liver Function Test (LFT) explained in detail. Learn about LFT parameters, liver diseases, diet tips, and best green vegetables for healthy liver function.

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