Fatty Liver Index (FLI) Calculator
Metabolic Relevance
FLI uses the Bedogni algorithm: e^(0.953×ln(TG) + 0.139×BMI + 0.718×ln(GGT) + 0.053×Waist − 15.745) / (1 + e^...) × 100. FLI <30 rules OUT fatty liver (87% sensitivity), while FLI ≥60 rules IN fatty liver (86% specificity). This non-invasive tool replaces ultrasound for initial screening.
Recommended testing frequency:
Every 3-6 months during active lifestyle intervention, then annually once stable in the <30 range
Did you know?
NAFLD affects 25-30% of adults worldwide, making it the most common liver condition globally. Most people with fatty liver have no symptoms until advanced stages.
FLI responds rapidly to carbohydrate restriction. Studies show significant improvements within 3-6 months of dietary intervention, often before significant weight loss occurs.
Want to understand your result better?
Learn about interpretation, what affects your score, and evidence-based strategies to improve it.
Read the full guideEvidence-Based
This calculator is based on peer-reviewed research validated across thousands of clinical studies.
View scientific references(5)Medical Disclaimer
Why Optimal Thresholds Differ?
Standard Medical
⚠️ Binary rule-in/rule-out for hepatic steatosis
Research Consensus
✓ Earlier intervention prevents NASH progression
Metabolic Optimization
🔬 >20 point drops common with low-carb diets
