How to Use the Fatty Liver Risk Checker
If bloodwork flagged elevated liver enzymes or you're concerned about abdominal weight gain, this calculator can help estimate your non-alcoholic fatty liver risk. It uses the internationally validated Fatty Liver Index (FLI), developed by Italian researchers, combining BMI (from height and weight), waist circumference, triglycerides (TG), and GGT into a single probability score.
These four values are combined through a logistic formula that produces a probability from 0 to 100. A score below 30 suggests fatty liver is unlikely, 30-60 is an indeterminate range, and 60 or above suggests fatty liver is likely. Higher waist circumference, triglycerides, and GGT all push the score up, since abdominal fat and elevated liver enzymes are both closely tied to fatty liver risk.
Keep in mind FLI is a screening estimate, not a diagnostic test that replaces an ultrasound or liver biopsy. If your score comes out 60 or higher, it's worth getting an abdominal ultrasound for confirmation, and discussing weight management, reducing alcohol intake, and exercise with a gastroenterologist or primary care doctor.
Frequently Asked Questions
The Fatty Liver Index (FLI) combines BMI, waist circumference, triglycerides, and GGT in a validated logistic formula that outputs a probability from 0 to 100. Below 30 means low probability, 30-60 is indeterminate, and 60 or above means high probability.
They appear on standard bloodwork from an annual physical or liver panel. Triglycerides (TG) and gamma-glutamyl transferase (GGT) are routinely included in basic metabolic and liver function panels.
Not necessarily. FLI is a screening probability estimate, not a substitute for an ultrasound. A score of 60 or higher means it's worth getting an abdominal ultrasound or other imaging for an accurate diagnosis.