Does lifting weights raise liver enzymes?

Yes, intense resistance training raises AST and ALT for up to a week. In a controlled study of healthy men, a single one hour weightlifting session raised AST to about three times baseline and ALT to about twice baseline, peaking around day three and still elevated at day seven, while GGT and bilirubin did not change. A man who trains should draw blood after at least 48 to 72 hours, ideally seven days, without heavy lower body or eccentric work, and ask for creatine kinase on the same panel so muscle can be separated from liver.

What does the AST to ALT ratio mean?

The AST to ALT ratio helps separate the causes of raised liver enzymes. Metabolic fatty liver usually produces a ratio below 1, with ALT higher than AST. A ratio above 2, especially with a raised GGT, is the classic pattern of alcohol related liver injury. The ratio also drifts above 1 as any chronic liver disease progresses toward advanced fibrosis, so a rising ratio over several years in a man with known fatty liver is a reason to calculate FIB-4 and consider a FibroScan. A high ratio the week after heavy training reflects muscle AST and means nothing about the liver.

What is a FIB-4 score and how do I calculate it?

FIB-4 is a free estimate of liver fibrosis calculated from age, AST, ALT and platelet count: age in years multiplied by AST, divided by platelets (in thousands per microlitre) multiplied by the square root of ALT. In men aged 40 to 65, a score below 1.3 makes advanced fibrosis unlikely with about 90 percent negative predictive value, 1.3 to 2.67 is indeterminate and warrants a FibroScan, and above 2.67 needs specialist review. In men over 65 the lower cutoff rises to 2.0 because age inflates the score. Any man with a raised ALT can calculate it from a panel he already has.

Why is my GGT high if my ALT is normal?

GGT is the most alcohol sensitive of the liver enzymes and often the first to rise with early fat in the liver, so an isolated high GGT in a man over 40 usually points to alcohol intake above about two drinks a day, early metabolic fatty liver, or a medication such as an anticonvulsant or certain antibiotics. GGT falls back over four to eight weeks of abstinence, which makes an eight week alcohol break a useful test of the cause. A GGT above 40 U/L in a man is also an independent marker of cardiovascular and diabetes risk and is worth acting on even with a normal ALT.

How long does it take to lower ALT?

ALT usually begins to fall within four to eight weeks of removing the cause and typically drops 10 to 20 U/L over the first three months of a successful weight loss and alcohol reduction programme. Training related elevations resolve within a week of rest. Alcohol related elevations improve over four to eight weeks of abstinence. Fatty liver related elevations track body weight and waist, with most men seeing ALT return below 30 U/L once they have lost 5 to 10 percent of body weight and kept alcohol below one drink a day for three months.

Can fatty liver be reversed in men over 40?

Yes, fatty liver is reversible at every stage before cirrhosis, and even early fibrosis can regress. In biopsy studies, losing 7 percent of body weight resolved steatohepatitis in about 65 percent of patients and losing 10 percent or more resolved it in 90 percent and regressed fibrosis in 45 percent. Resistance training, cutting sugar sweetened drinks, keeping alcohol below one drink a day and, where indicated, GLP-1 therapy are the interventions with the strongest evidence. The liver regenerates well; the goal is to act while the damage is still fat and inflammation rather than scar.

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Liver Enzymes for Men Over 40: What ALT, AST and GGT Actually Mean, Why Lifting and TRT Confuse the Panel, and the Free Score That Tells You If It Matters

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Lab Markers 15 min read Sep 15, 2026

Liver Enzymes for Men Over 40: What ALT, AST and GGT Actually Mean, Why Lifting and TRT Confuse the Panel, and the Free Score That Tells You If It Matters

Q: What is a normal ALT level for a man over 40?

A truly healthy ALT for a man is below about 30 to 33 U/L, according to the American College of Gastroenterology 2017 guideline and population studies that excluded men with fatty liver, viral hepatitis and heavy drinking. Many laboratories still print 40 to 55 U/L as the upper limit because their reference range was built from a population in which a third of men already had fat in the liver. A man over 40 should treat an ALT of 30 to 40 as a metabolic flag even when the report says normal, and an ALT below 25 as reassuring.

Q: Does TRT raise liver enzymes or damage the liver?

No, injectable testosterone, testosterone gels, pellets and the modern oral testosterone undecanoate products do not cause liver damage or meaningfully raise liver enzymes. The liver toxicity associated with anabolic steroids comes from 17-alpha-alkylated oral compounds such as methyltestosterone, oxandrolone and stanozolol, which are chemically different. In men with low testosterone and fatty liver, testosterone therapy tends to reduce liver fat by lowering visceral fat and improving insulin sensitivity. A man on TRT whose ALT rises should look at training, alcohol and supplements first.

Roughly four in ten men over 40 carry excess fat in the liver and most of them have an ALT the lab calls normal. The same panel will flag a man who trained legs two days before the draw as abnormal when his liver is fine. Neither result is useful until a man knows what each enzyme is, what pushes it up, and which second test settles the question.

Liver enzymes in men over 40 are read against a reference range that was built from a population in which a third of the men already had fatty liver, which is why an ALT of 45 U/L comes back without a flag at many labs while the American College of Gastroenterology puts the true healthy ceiling for a man at 33. At the same time, a hard training block, a course of creatine or a new testosterone prescription can move AST and ALT in ways that have nothing to do with liver damage. A man over 40 needs three enzymes, one ratio, one free fibrosis score and a clear idea of what he did in the week before the blood draw.

Liver enzymes are proteins that live inside liver cells and leak into the bloodstream when those cells are stressed, inflamed or dying. The standard panel reports three that matter for men over 40: alanine aminotransferase (ALT), aspartate aminotransferase (AST) and gamma-glutamyl transferase (GGT). ALT is concentrated almost entirely in the liver, which makes it the most liver-specific of the three. AST sits in the liver but also in skeletal muscle, heart muscle and red blood cells, so it rises after a hard training session as readily as after liver injury. GGT lives on the membrane of liver and bile duct cells and responds to alcohol, to fat in the liver and to a long list of medications. Alkaline phosphatase and bilirubin round out the panel but are usually normal in the problems that affect this age group.

Liver enzymes belong in the men over 40 biomarker series alongside kidney function, uric acid and ApoB because the organ they describe sits at the centre of everything else. The liver decides how much glucose enters the blood overnight, how much triglyceride is packaged into VLDL, how quickly testosterone and estradiol are cleared, and how much sex hormone binding globulin is made. A liver carrying excess fat does all of those jobs worse. It raises fasting glucose, pushes triglycerides up and HDL down, lowers SHBG and total testosterone, and accelerates the same insulin resistance that caused the fat in the first place. The enzymes are the only routine window into that organ, and most men have been reading them against the wrong range.

33 U/L

True Healthy ALT Ceiling For Men

The American College of Gastroenterology 2017 guideline sets the upper limit of normal ALT at 29 to 33 U/L for men, based on cohorts screened to exclude fatty liver, viral hepatitis and heavy drinking. Many US laboratories still print 40 to 55 U/L as the top of the range

~40%

Of US Men Aged 40 To 59 Have Fatty Liver

NHANES imaging data put metabolic dysfunction associated steatotic liver disease (MASLD) at roughly 38 to 42 percent of men in this age band. Around half of them have an ALT inside the standard laboratory range

7 days

How Long Heavy Lifting Can Raise AST And ALT

In a controlled study of healthy men performing a single intense resistance session, AST, ALT and creatine kinase stayed above baseline for at least seven days. Liver-specific markers such as GGT and bilirubin did not move

2 to 1

AST To ALT Ratio That Points To Alcohol

Fatty liver from metabolic causes usually produces an AST to ALT ratio below 1. A ratio above 2 with a raised GGT is the classic signature of alcohol related liver injury. The ratio also climbs above 1 as any liver disease progresses to advanced fibrosis

1.3

FIB-4 Score Below Which Fibrosis Is Unlikely

FIB-4 combines age, AST, ALT and platelet count into a single number. Below 1.3 in men aged 40 to 65 rules out advanced fibrosis with about 90 percent negative predictive value. Above 2.67 needs imaging and specialist review

62.9%

Steatohepatitis Resolution With Semaglutide In ESSENCE

In the phase 3 ESSENCE trial published in 2025, semaglutide 2.4 mg weekly resolved steatohepatitis without worsening fibrosis in 62.9 percent of participants versus 34.3 percent on placebo at 72 weeks, and improved fibrosis in 36.8 versus 22.4 percent

What Is A Normal ALT Level For A Man Over 40?

A truly normal ALT for a man over 40 is below about 30 to 33 U/L, not the 40 to 55 U/L printed on most laboratory reports. The discrepancy exists because laboratory reference ranges are built from the middle 95 percent of results in a local population, and in any modern population a third or more of the men have fat in the liver. The range was set by including the very people it was supposed to identify. When researchers restricted the reference group to men with normal body weight, normal lipids, normal glucose, no viral hepatitis and low alcohol intake, the 95th percentile of ALT fell to roughly 30 U/L. The American College of Gastroenterology adopted 29 to 33 U/L for men and 19 to 25 U/L for women in its 2017 practice guideline, and the same figures appear in the Italian and Korean population studies that preceded it.

The distinction is not academic. In a Korean cohort of 142,055 adults followed for eight years and published in the BMJ in 2004, men with an ALT of 30 to 39 U/L, entirely inside the conventional range, had a liver related mortality risk several times higher than men below 20 U/L, and the risk kept climbing with every band above that. An ALT of 38 in a 48 year old man with a waist over 40 inches is a flag for fatty liver even though the report says normal. An ALT of 22 in the same man is genuinely reassuring. The number should be read as a continuous variable against the 30 U/L line, not as a pass or fail against the lab range.

Estimated Prevalence Of Fatty Liver (MASLD) In US Men By Age Band

The bar chart explains why liver enzymes deserve attention in this age group specifically. Fatty liver prevalence in men climbs steeply through the thirties and forties, tracking the rise in visceral fat and insulin resistance, and peaks in the fifties at around four men in ten. Prevalence appears to fall slightly after 70, but that is partly because men with the most advanced disease have already developed cirrhosis or died of the cardiovascular disease that travels with it. The window for catching fat in the liver while it is fully reversible is the decade between 40 and 50, and ALT read against the correct ceiling is the cheapest screen available.

What Do ALT, AST And GGT Each Measure, And What Pushes Them Up?

ALT measures liver cell injury, AST measures injury to liver or muscle, and GGT measures stress on the liver and bile ducts, most often from alcohol, fat or medication. Reading the three together tells a man far more than any one of them alone. A raised ALT with a normal AST and a normal GGT in a man with a large waist is fatty liver until proven otherwise. A raised AST with a normal ALT and a raised creatine kinase in a man who trained hard that week is muscle, not liver. A raised GGT with an AST about twice the ALT is the pattern of alcohol. And all three rising together over successive panels with a falling platelet count is the pattern that needs a gastroenterologist.

GGT deserves more attention than it gets. GGT is the most sensitive of the three to alcohol, rising within a few weeks of regular drinking above roughly two drinks a day and falling back over four to eight weeks of abstinence, which makes it a useful honest broker for a man who is unsure how much his intake matters. GGT is also an independent predictor of cardiovascular death and type 2 diabetes in large cohorts, even within the normal range, because it tracks oxidative stress and fat in the liver. A GGT in the top third of the reference range, above about 40 U/L in men, with a normal ALT, is often the earliest enzyme signal of a metabolic liver problem.

What Raises Each Liver Enzyme, And How To Tell Liver From Everything Else

Cause	ALT	AST	GGT	How To Confirm Or Rule Out
Fatty liver (MASLD) from insulin resistance	Up, usually 35 to 80 U/L	Up but less than ALT	Mildly up	Waist, triglycerides, HbA1c, fasting insulin, ultrasound or FibroScan
Alcohol above 2 drinks a day	Up modestly	Up, often twice ALT	Up markedly	AST to ALT ratio above 2, GGT falls after 4 to 8 weeks off alcohol
Intense resistance training in the prior 7 days	Up modestly	Up, sometimes 2 to 3 times normal	Normal	Creatine kinase very high, GGT and bilirubin normal, repeat after 7 days rest
Injectable or transdermal testosterone therapy	Little or no change	Little or no change	Little or no change	No action needed. Check haematocrit and lipids instead
Oral 17-alpha-alkylated androgens (methyltestosterone, oxandrolone, stanozolol)	Up, can be marked	Up	Up	Stop the compound. Bilirubin and alkaline phosphatase can also rise. Not the same class as oral testosterone undecanoate
Acetaminophen above 3 grams a day, amoxicillin-clavulanate, some antifungals	Up, sometimes sharply	Up	Up	Stop the drug and repeat in 2 to 4 weeks. Report any yellowing of the eyes
High dose green tea extract, kava, some bodybuilding supplements	Up	Up	Up	Stop every supplement for 4 weeks and repeat. Supplement injury is now the leading cause of drug induced liver injury in US registries
Hepatitis B or C	Up, persistent	Up	Variable	HBsAg and hepatitis C antibody. CDC recommends every adult be tested once for hepatitis C
Hemochromatosis (iron overload)	Up	Up	Normal or up	Ferritin above 300 with transferrin saturation above 45 percent, then HFE gene test
Statins	Small rise in 1 to 3 percent of users	Up if muscle symptoms	Normal	Rarely clinically meaningful. Statins are safe and beneficial in fatty liver
Hypothyroidism, celiac disease, muscle disease	Up mildly	Up	Normal	TSH, tissue transglutaminase antibody, creatine kinase

The Three Questions Before Any Liver Worry

When a liver enzyme comes back above 30 U/L, the first three questions are about the week before the draw, not about the liver. Did the man train hard in the prior seven days, especially eccentric or leg work, and is his creatine kinase also high? Did he drink more than usual, and what is his GGT and AST to ALT ratio doing? Did he start any new medication, supplement or oral androgen in the prior two months? If the answer to all three is no, the enzymes are almost certainly reporting on fat in the liver, and the next step is a waist measurement, triglycerides, HbA1c and a FIB-4 score, not a repeat panel in a year.

Does Weight Training Raise ALT And AST?

Yes, intense resistance training raises both AST and ALT, and the effect lasts long enough to distort a blood panel drawn up to a week later. In a 2008 study published in the British Journal of Clinical Pharmacology, 15 healthy men with no liver disease performed a single one hour weightlifting session and had blood drawn daily for a week. AST peaked at about three times baseline and ALT at about twice baseline around day three, and both remained above the upper limit of normal at day seven. Creatine kinase rose more than tenfold. GGT, alkaline phosphatase and bilirubin, the markers that come only from the liver, did not change at all. The authors concluded that a man should avoid heavy training for at least a week before a liver panel or accept that the AST and ALT will be uninterpretable.

The practical rule for a man who trains is to keep the panel comparable. Draw blood after 48 to 72 hours without a heavy lower body or eccentric session, ideally on a rest day after a light week, and ask for creatine kinase on the same draw. If AST is up, ALT is up less, creatine kinase is in the hundreds or thousands and GGT is normal, the liver is not the problem. If ALT is up more than AST and creatine kinase is normal, the muscle explanation does not hold. Creatine supplementation itself does not raise liver enzymes in controlled trials, although it raises the volume of training a man can do, which does.

Liver Enzymes And Creatine Kinase In The Week After A Single Heavy Resistance Session

AST (U/L)
ALT (U/L)
GGT (U/L)

The line chart is a schematic of the pattern seen in resistance training studies rather than one man's results. AST leads because skeletal muscle is rich in it and the fibres damaged by heavy eccentric work release it directly into the blood. ALT follows more slowly, peaks later and lingers because its half-life in circulation is about 47 hours compared with roughly 17 hours for AST. GGT stays flat because muscle does not contain it. A man who understands this curve will never again panic over an AST of 65 drawn the morning after a deadlift session, and will never again let a physician order an ultrasound for it either.

Does Testosterone Therapy Harm The Liver?

Injectable, transdermal and modern oral testosterone undecanoate do not cause liver damage, and in men with low testosterone and fatty liver they tend to reduce liver fat. The historical fear of testosterone and the liver comes from a different class of compound: the 17-alpha-alkylated oral androgens such as methyltestosterone, oxandrolone and stanozolol, which were chemically modified to survive first pass metabolism in the liver and which cause cholestasis, enzyme elevation and rarely liver tumours. Testosterone cypionate, enanthate, gels and pellets bypass the liver on the way into the blood and have shown no signal of hepatotoxicity in decades of use. The oral testosterone undecanoate products approved since 2019 are absorbed through the lymphatic system and have not raised liver enzymes in their trials.

The direction of effect may in fact be favourable. Low testosterone and fatty liver travel together in men over 40, with hypogonadal men roughly twice as likely to have MASLD, and in the phase 2 LiFT trial of oral testosterone undecanoate (LPCN 1144) in men with confirmed steatohepatitis, liver fat measured by MRI fell by roughly a third to a half over 16 weeks in the treated groups alongside falls in ALT. Testosterone therapy increases lean mass, reduces visceral fat and improves insulin sensitivity, all of which pull fat out of the liver. A man on TRT whose ALT rises should look at his training week, his alcohol and his supplements before he looks at his prescription. The TRT specific liver concern is not the enzymes but oestradiol, which the liver clears, and haematocrit, which the liver does not.

How Does Fatty Liver Progress, And What Is A FIB-4 Score?

Fatty liver progresses in stages from simple fat storage through inflammation to scarring, and the FIB-4 score is a free calculation from routine bloodwork that estimates how far along that path a man is. Steatosis alone, fat in more than 5 percent of liver cells without inflammation, is present in around 40 percent of men over 40 and is fully reversible with weight loss. In roughly a fifth of those men the fat triggers inflammation and cell injury, which is steatohepatitis (MASH). Steatohepatitis lays down scar tissue over years, graded as fibrosis stages F1 to F3, and F4 is cirrhosis. Cardiovascular disease, not liver failure, is the leading cause of death at every stage before cirrhosis, which is why the enzymes should be read as a metabolic marker first and a liver marker second.

The Stages Of Metabolic Fatty Liver Disease And What Each One Means For A Man Over 40

Stage 1

Simple steatosis

Fat in more than 5 percent of liver cells without inflammation. Present in about 40 percent of men aged 40 to 59. ALT often 25 to 45 U/L. Fully reversible with 5 to 10 percent body weight loss. Cardiovascular risk already raised

→

↓

Stage 2

Steatohepatitis (MASH)

Fat plus inflammation and ballooned, dying liver cells. Affects roughly 20 percent of men with steatosis. ALT usually higher and AST starting to climb. Still reversible: 10 percent weight loss resolves MASH in about 90 percent of cases in biopsy studies

→

↓

Stage 3

Fibrosis F1 to F3

Scar tissue laid down over years of inflammation. FIB-4 rises above 1.3, AST to ALT ratio drifts above 1, platelets begin to fall. F2 and F3 are the stages where resmetirom and semaglutide are approved or proven. Regression is possible but slower

→

↓

Stage 4

Cirrhosis (F4)

Architecture of the liver replaced by scar. FIB-4 usually above 2.67, platelets often below 150, albumin falls. Annual ultrasound for liver cancer becomes mandatory. About 2 to 3 percent of men with fatty liver reach this stage, almost always after decades

→

↓

Off ramp

Reversal at any early stage

Weight loss of 7 to 10 percent, alcohol below 1 drink a day, resistance training and GLP-1 or SGLT2 therapy where indicated pull men back from stages 1 to 3. The liver regenerates. The scar of F4 mostly does not

FIB-4 is calculated as age in years multiplied by AST, divided by platelet count (in thousands per microlitre) multiplied by the square root of ALT. A 50 year old man with an AST of 30, an ALT of 45 and platelets of 240 scores (50 × 30) ÷ (240 × 6.7) = 0.93, which is low risk. Below 1.3 in men aged 40 to 65 rules out advanced fibrosis with roughly 90 percent negative predictive value and needs nothing more than a recheck in one to three years. Between 1.3 and 2.67 is indeterminate and should be followed by a FibroScan (transient elastography) or an enhanced liver fibrosis blood test. Above 2.67 needs a gastroenterologist. In men over 65 the lower cutoff shifts to 2.0 because age inflates the score. Every man over 40 with an ALT above 30 or a waist above 40 inches can calculate this from a panel he already has.

What Are The Most Common Causes Of Raised Liver Enzymes In Men Over 40?

Fatty liver from insulin resistance causes the large majority of raised liver enzymes in men over 40, with alcohol a distant second and medications, supplements, viral hepatitis and iron overload sharing the remainder. The proportions matter because they set the order of investigation. A man with a mildly raised ALT and a large waist does not need a hepatitis panel first; he needs a triglyceride level and an HbA1c. He does need the hepatitis and iron tests once, because both are cheap, both are treatable and both are missed for years when everyone assumes the enzymes are metabolic. And he needs to bring every supplement bottle to the appointment, because herbal and bodybuilding products now account for about one in five cases of drug induced liver injury in the US registry, up from one in twenty two decades ago.

Approximate Causes Of Persistently Raised ALT In Men Aged 40 To 65 In Primary Care

Fatty liver from insulin resistance (MASLD)
Alcohol related liver disease
Medications and supplements
Hepatitis B and C
Hemochromatosis and other genetic causes
Autoimmune, thyroid, celiac and muscle causes

The pie chart is drawn from primary care and population studies of unexplained raised transaminases in Western men and rounded for clarity, and the exact split varies by region and by how heavily the population drinks. The message is stable across all of them. Roughly six in ten men with a raised ALT have fat in the liver from metabolic causes, and the cause of that fat is the same insulin resistance that drives low testosterone, high triglycerides and rising blood pressure in this age group. Treating the liver and treating the metabolism are the same project.

How Do You Lower ALT And Reverse Fatty Liver?

Losing 7 to 10 percent of body weight reverses fatty liver in most men and is the only intervention proven to resolve steatohepatitis in biopsy studies, and the tools that produce that loss most reliably in men over 40 are resistance training, protein at 1.6 grams per kilogram, alcohol below one drink a day and, where indicated, a GLP-1 medication. In the landmark 2015 Cuban biopsy study of 293 patients, 3 to 5 percent weight loss reduced fat in most livers, 7 percent resolved steatohepatitis in about 65 percent, and 10 percent or more resolved it in 90 percent and regressed fibrosis in 45 percent. ALT typically falls by 10 to 20 U/L over the first three months of a successful programme and is a reasonable proxy for progress between scans.

Weight loss of 7 to 10 percent of body weight through any sustainable method. This is the single intervention with biopsy proven reversal of steatohepatitis and remains the foundation under everything else on this list
Resistance training three to four times a week. Trials show resistance exercise reduces liver fat by 10 to 15 percent on MRI even without weight loss, by improving muscle glucose uptake and reducing the flow of fatty acids to the liver
Alcohol below one drink a day, and none for the eight weeks before a repeat panel. Even moderate alcohol roughly doubles the rate of fibrosis progression in men who already have metabolic fatty liver
Eliminating liquid sugar and reducing refined carbohydrate. Fructose is metabolised almost entirely by the liver and drives de novo lipogenesis directly. Two sugar sweetened drinks a day roughly doubles fatty liver risk in men
Coffee, two to three cups a day. Multiple cohorts and meta-analyses associate regular coffee intake with about 30 percent lower risk of fibrosis and lower ALT, an effect that survives adjustment for everything else
GLP-1 therapy where weight and metabolic criteria are met. Semaglutide 2.4 mg resolved steatohepatitis in 62.9 percent of ESSENCE participants and tirzepatide resolved it in up to 74 percent in the phase 2 SYNERGY-NASH trial
Resmetirom (Rezdiffra), the first drug approved specifically for steatohepatitis with F2 to F3 fibrosis in March 2024, which resolved MASH in 26 to 30 percent versus 10 percent on placebo. Specialist prescribed and not a substitute for the items above
Vitamin E 800 IU daily and pioglitazone have trial support in non-diabetic and diabetic MASH respectively, but both carry trade-offs and belong in a specialist conversation rather than a supplement stack
Correcting low testosterone in hypogonadal men, which reduces visceral fat and liver fat and improves insulin sensitivity. Not a liver treatment in itself, but a liver benefit in men who qualify for it on other grounds

What Should A Man Over 40 Do With A Raised Liver Enzyme Result?

A man over 40 with an ALT above 30 U/L should first rule out training, alcohol and supplements as the cause, then treat the result as a metabolic warning and act on waist, glucose and triglycerides, while ordering the handful of one-time tests that catch the rarer causes. The plan below assumes a mildly raised result, meaning ALT between 30 and 100 U/L with no jaundice, no abdominal pain and no history of liver disease. An ALT above 200, any yellowing of the skin or eyes, dark urine or a rapidly rising trend across two panels a few weeks apart is a different situation and needs a physician within days, not a twelve month plan.

A Twelve Month Plan For A Man Over 40 With A Raised ALT Or GGT

Month 1: Get a clean baseline and rule out the non-liver causes

✓Repeat the liver panel after seven days without heavy training, eight weeks with alcohol at or below one drink a day if possible, and four weeks off every non-essential supplement. Add creatine kinase, GGT, platelets, ferritin with transferrin saturation, HBsAg, hepatitis C antibody and TSH to the same draw
✓Calculate FIB-4 from the result. Below 1.3 means no fibrosis workup is needed now. Between 1.3 and 2.67, book a FibroScan. Above 2.67, book a gastroenterologist
✓Measure waist at the navel, and pull triglycerides, HDL, HbA1c, fasting insulin and total testosterone with SHBG from the same panel. These are the inputs that decide whether the liver fat is going to grow or shrink

Months 2 to 3: Remove what the liver is reacting to

✓If GGT was raised or the AST to ALT ratio was above 1.5, treat alcohol as the primary lever and take eight weeks completely off. GGT should fall by at least a third; if it does not, alcohol was not the main driver
✓Stop any 17-alpha-alkylated oral androgen, high dose green tea extract, kava or unlabelled bodybuilding product permanently. Keep creatine, injectable or transdermal testosterone and prescribed statins; none of them are the problem
✓Cut all sugar sweetened drinks and fruit juice. This is the single dietary change with the most direct effect on liver fat and the easiest to keep

Months 4 to 6: Build the metabolic programme

✓Resistance training three to four sessions a week plus two to three zone 2 cardio sessions of 30 to 45 minutes. Protein at 1.6 grams per kilogram of body weight. Target a 5 percent body weight loss by month 6 if waist is above 40 inches
✓Discuss with the physician whether a GLP-1 medication is appropriate if BMI is above 27 with a raised ALT, HbA1c above 5.7 or a FIB-4 above 1.3, since the trial evidence for resolving steatohepatitis with semaglutide and tirzepatide is now among the strongest in liver medicine
✓If total testosterone is below 300 ng/dL on two morning draws with symptoms, address it. Correcting hypogonadism reduces visceral and liver fat and is not a liver risk with injectable, transdermal or modern oral undecanoate formulations

Months 7 to 12: Retest and set the cadence

✓Repeat ALT, AST, GGT, platelets and the metabolic panel at month 6 and month 12 with identical preparation: seven days off heavy training, same lab, same fasting state. Target an ALT below 30, a GGT below 40 and a FIB-4 that is flat or falling
✓If ALT is still above 40 at month 12 despite 7 percent weight loss and alcohol under control, request a FibroScan and a gastroenterology referral even if FIB-4 is low. Persistent elevation after the metabolic drivers are fixed needs a second look
✓Set the long term cadence: annual liver panel with FIB-4 for every man over 40, and every six months for men with a FIB-4 above 1.3, type 2 diabetes or a history of steatohepatitis. Every man with cirrhosis needs an ultrasound every six months for life

The Bottom Line

Liver enzymes in a man over 40 are read against a reference range that was built from men who already had fatty liver, which means an ALT of 45 gets a pass while the true healthy ceiling is about 30. At the same time the panel is thrown off by exactly the things men in this age group do: heavy training raises AST and ALT for a week, alcohol raises GGT for two months, and a shelf of supplements can raise all three. Separate those out, then read the ALT against 30, check the AST to ALT ratio and GGT, and calculate FIB-4 from the panel already in hand. Injectable and transdermal testosterone are not the problem. Fat in the liver from insulin resistance almost always is, and the same programme that fixes waist, triglycerides and testosterone fixes the liver on the way.