Current promotion
Fatty Liver Blood Tests: ALT, AST & GGT Enzyme Panels
Objective enzyme numbers for the liver risk factors that build up quietly.
Affiliate disclosure: we earn a commission when you purchase lab tests through links on this site, at no extra cost to you. Learn more
Individual liver-related tests from $19.95 and bundled Liver Health panels from $69.95; the 20% promotion brings these to $15.96 and $55.96 (promotional pricing at time of writing).
At a glance
Blood testing for fatty liver risk tracks the enzymes most sensitive to liver stress, ALT, AST, and GGT, alongside supporting markers like bilirubin, albumin, and a comprehensive metabolic panel. It is designed for adults with risk factors such as excess weight, diabetes or prediabetes, or regular alcohol use who want objective numbers to review with their doctor. Testing can be ordered online without a doctor's visit, with private results often available in 24–48 hours.
Best suited for
- Adults carrying extra weight, or with diabetes or prediabetes, who want to monitor markers associated with fatty liver
- People who drink regularly and want an objective read on GGT and other alcohol-sensitive liver markers
- Anyone whose past lab work showed mildly elevated liver enzymes and who wants follow-up numbers for their doctor
- People on long-term medications or supplements that can affect liver enzymes
- Self-trackers making lifestyle changes who want before-and-after lab data
What's included
LH-1 Liver Health Panel
Focused baseline: GGT, Hepatic Function Panel, LDH, and PT with INR (4 tests, 14 biomarkers)
LH-2 Liver Health Panel
Adds alpha-1-antitrypsin, AFP with AFP-L3, fractionated bilirubin, ceruloplasmin, CMP, and iron studies (9 tests, 34 biomarkers)
LH-3 Liver Health Panel
Extends LH-2 with copper and hepatitis A, B, and C screening (14 tests, 41 biomarkers)
LH-4 Liver Health Panel
Most comprehensive option, spanning enzymes, proteins, genetic markers, and hepatitis screening (16 tests, 44 biomarkers)
Hepatic Function Panel (LFT)
Gamma-Glutamyl Transferase (GGT) Test
Lactate Dehydrogenase (LDH) Test
Prothrombin Time with INR Test
Comprehensive Metabolic Panel (CMP) Test
Iron and Total Iron Binding Capacity (TIBC) Test
Ceruloplasmin Test
Alpha-1 Antitrypsin Quantitative Test
Alpha-Fetoprotein and AFP-L3 Test
Deep-dive the key markers: ALT, eGFR, Fasting Glucose, Ferritin
Key biomarker ranges
Commonly used adult reference ranges for markers this panel measures, labs vary, so always interpret results against your lab's stated ranges and with your doctor.
Commonly used cutoffs place ALT below roughly 30–40 U/L, with slightly lower thresholds often cited for women; recent exercise and alcohol can raise results.
| Zone | Range |
|---|---|
| Optimal | 0–30 U/L |
| Borderline high | 30–50 U/L |
| High | 50–100 U/L |
For eGFR, lower is worse: 90+ is consistent with full kidney function, while sustained values below 60 are the commonly used threshold of concern.
| Zone | Range |
|---|---|
| Kidney failure range | 0–15 mL/min/1.73m² |
| Reduced | 15–60 mL/min/1.73m² |
| Mildly reduced | 60–90 mL/min/1.73m² |
| Optimal | 90–120 mL/min/1.73m² |
Commonly used reference ranges place fasting glucose at 70–99 mg/dL; results vary with sleep, stress, and recent illness, and labs differ slightly.
| Zone | Range |
|---|---|
| Low | 50–70 mg/dL |
| Optimal | 70–100 mg/dL |
| Prediabetic range | 100–126 mg/dL |
| Diabetic range | 126–160 mg/dL |
The importance of testing
Excess weight, insulin resistance, and regular alcohol use are among the most common reasons liver enzymes drift out of range, and the drift usually happens quietly, long before anything feels wrong. ALT and AST are markers associated with liver cell stress, while GGT is particularly associated with bile flow and with alcohol and medication effects, which is why these three enzymes anchor most liver risk conversations.
Context matters as much as the enzymes themselves. A comprehensive metabolic panel adds glucose, electrolytes, and kidney values, helping connect liver numbers to the broader metabolic picture that fatty liver risk sits inside. Iron and TIBC screen for markers associated with iron overload, another quiet contributor to liver stress, and PT/INR reflects whether the liver's protein-synthesis work is keeping up.
A single result is a snapshot; the useful signal is the trend. Testing before and after a stretch of lifestyle changes, weight loss, reduced alcohol, better glucose control, gives you and your doctor a concrete way to see whether liver markers are moving in the right direction. Results arrive in a private portal with trend charts, and anything out of range is a flag to review with your clinician, who may recommend imaging or further evaluation.
Promo code
LH20Save 20% with code LH20, current promotion; confirm final pricing on the partner page.
Ready to get your numbers? Order online, visit a nearby draw site, and receive private results to review with your doctor.
Order NowFrequently asked questions
Can a blood test show fatty liver?
Blood tests cannot confirm fatty liver on their own, but they measure enzymes, especially ALT, AST, and GGT, that are commonly associated with liver stress from fat accumulation, alcohol, or medications. Out-of-range results are a flag to review with your doctor, who may recommend imaging or further evaluation to understand the cause.
Which markers matter most for fatty liver risk?
ALT, AST, and GGT are the core enzymes to track, since they are the markers most associated with liver cell stress and with alcohol or medication effects. A comprehensive metabolic panel adds glucose and other metabolic context, and iron with TIBC screens for markers associated with iron overload, a less common but relevant contributor.
Can I order this testing without seeing a doctor first?
Yes, no doctor's visit is needed to place an order, because the partner lab provides the physician requisition. You order online, visit one of about 2,100 draw locations, and private results are typically ready in 24–48 hours to bring to your own clinician.
Should I fast or avoid alcohol before testing?
Fasting is usually not required for liver enzyme tests, though adding lipids or fasting glucose means planning for 8–12 hours without food. Avoid heavy alcohol and strenuous exercise for 24 hours before your draw unless your clinician advises otherwise, since both can temporarily shift results.
Is this testing available in every US state?
No, direct-to-consumer lab testing is restricted or prohibited in New York, New Jersey, and Rhode Island, so residents of those states may be blocked at the partner's checkout. Most other US states are served through the partner's nationwide network of draw locations.
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