Plans for Your Body · Blood sugar & insulin
The fatty liver plan
Your liver is storing what you can’t burn.
The goal: Fatty liver (now called MASLD) is the liver filling with fat because insulin keeps it in storage mode. It often reverses: cut sugar and refined carbs, skip alcohol, eat in a window, fast, lift and walk. Losing 5% of your weight cuts liver fat; 10% often clears inflammation and can shrink early scarring. Check for fibrosis first, with your doctor.
Fatty liver is usually found by accident, on an ultrasound ordered for something else, and then dismissed: “lots of people have it, lose some weight.” Lots of people do. A minority go on to scarring, cirrhosis or liver cancer, and nobody can tell you in advance which. This plan finds out whether yours has scarred, then empties the liver while it still can heal.
- MeasureLiver enzymes · FIB-4 · elastography if needed · fasting insulin · waist
- ChangeNo alcohol · cut sugar and refined carbs · eating window · weekly fast · strength and cardio
- RetestEnzymes and weight at 3 months; fibrosis check with your doctor at 6–12
Most people are told to lose weight. This tells you how, and how much.
Not medical advice
Discuss everything here with a medical doctor before acting on it — supplements included. Your doctor has your bloodwork and history. We have neither.
02 Why it matters
The most common liver disease you’ve never been treated for.
How common
About one adult in four has it, and about 70% of people with type 2 diabetes. Most have no symptoms and normal-looking blood work. A “normal” ALT doesn’t rule it out.
What it leads to
Fat first, then inflammation (MASH), then scarring (fibrosis), then cirrhosis. Scarring is what predicts liver failure and liver cancer. Fatty liver also travels with heart disease, which is what kills most people who have it.
The evidence
In a year-long study of people with biopsy-proven MASH, those who lost 10% or more of their weight saw the inflammation resolve in 90% of cases and the scarring regress in 45%. Few got that far: across everyone in the study, the inflammation cleared in about a quarter.
The liver regenerates. It needs you to stop filling it.
03 How it works
High insulin, and a liver full of fat.
When insulin stays high, the liver turns surplus sugar into fat and keeps it. Fructose (half of table sugar, most of the sugar in juice) is handled almost entirely by the liver, which makes fat from it readily. Alcohol does the same. A fatty liver ignores insulin, so the pancreas makes more, and the loop tightens.
- MASLD
- Metabolic dysfunction-associated steatotic liver disease: the 2023 name for what was NAFLD. Fat in the liver plus at least one metabolic risk factor, such as a big waist, high blood sugar, high blood pressure or high triglycerides.
- Where the fat comes from
- Parks traced it with isotopes. In people with fatty liver, about 59% of liver fat came from fat released by the body’s fat stores, 26% was made new in the liver from carbohydrate, and 15% came straight from meals. In her later work, people with high liver fat made new fat more than three times faster than people with low liver fat, and kept making it even when fasting.
- MASH
- The inflamed form, formerly NASH. Only a biopsy confirms it, but non-invasive tests can tell your doctor how worried to be.
- Fibrosis
- Scar tissue. The stage that matters. Early stages can regress; cirrhosis mostly doesn’t.
- FIB-4
- A score from your age, two liver enzymes (AST, ALT) and platelets, all from routine blood work. Under 1.3 means advanced scarring is unlikely. Your doctor can calculate it today.
- Elastography
- An ultrasound-style scan (FibroScan is the common one) that measures liver stiffness and fat. The next step if FIB-4 isn’t clearly low.
04 The steps
Check for scarring. Empty the liver. Retest.
Measure · Week 0
First: is there scarring?
- FIB-4ask your doctor
From routine blood work. Under 1.3: low risk, and this plan is your treatment. 1.3 or higher: ask for elastography. 2.67 or higher: ask about seeing a liver specialist.
- Liver enzymesALT, AST, GGT
Your baseline. Enzymes often fall within weeks as liver fat drops, which makes them a good early progress marker, even though normal values don’t rule the disease out.
- Fasting insulin and glucosemorning, after an overnight fast
Together they give HOMA-IR, a simple insulin-resistance score. Fasting insulin often isn’t covered in Canada. It’s cheap to pay for. Fatty liver and insulin resistance are the same problem seen from two angles. This number tracks the one underneath.
- Waist, weight, HbA1c, lipidsthe metabolic picture
Waist more than half your height, high triglycerides and rising HbA1c all point the same way. You need the weight to measure the 5%, 7% and 10% targets.
Change the inputs · Months 1–6
Stop filling the liver. Then make it draw down.
- Alcoholnone
It goes straight to the liver, raises triglycerides and adds to liver fat. Less is better; none is best while you’re fixing the numbers. With a fatty liver, alcohol is a second injury on top of the first. If there is any scarring, guidelines say stop completely.
- Sugar and refined carbscut hard
Sugar, sweet drinks, juice, white flour and most packaged snacks. The fastest lever on insulin, blood sugar and triglycerides. Sugar and juice are the priority because of the fructose. In Lustig’s study, swapping sugar for starch at the same calories roughly halved liver fat in children within about ten days. Parks’s work points the same way: in a fatty liver the fat-making pathway runs hot, and carbohydrate is its raw material.
- Real foodprotein first
Build meals on protein, vegetables and natural fats: fish, meat, eggs, dairy, legumes, nuts. Protein and fibre keep you full and flatten glucose spikes.
- Fats to cook witholive oil first
Extra-virgin olive oil, avocado and its oil, nuts, oily fish. Olive oil has the strongest trial evidence: in PREDIMED, a Mediterranean diet with extra olive oil cut heart attacks and strokes. European liver guidelines recommend a Mediterranean pattern, which this is.
- Eating windowdaily, e.g. noon to 8 pm
Eat inside a fixed window and not outside it. Fewer insulin spikes per day, fewer chances to overeat.
- 36-hour fastonce a week
Dinner one day, then only water, black coffee or tea until breakfast two days later. A standard protocol in Dr. Fung’s clinic: long enough for insulin to fall and the body to draw on stored fat. A pinch of salt helps with headaches. Fasting runs down the liver’s sugar stores first, then its fat. In Taylor’s Newcastle study, a very low-calorie diet cut liver fat by about three-quarters in eight weeks.
- Trainingstrength 2–3×/week, cardio 150+ min/week
Lift, and walk briskly or cycle most days. Muscle is where most of a meal’s glucose ends up, so more muscle means more room for it. Cardio makes that muscle more sensitive to insulin. Both cardio and lifting reduce liver fat, even before much weight comes off.
- Sleep7+ hours
One short night measurably worsens insulin sensitivity, blood sugar and appetite the next day. The cheapest part of the protocol, and the most skipped.
- Coffeeif you already drink it
Coffee drinkers tend to have less liver scarring in observational studies. Not a treatment, and no reason to start, but no reason to quit either. Black, not as a vehicle for syrup.
Before you fast
Don’t do extended fasts if you’re on insulin or other diabetes medication, pregnant, breastfeeding, underweight, or have a history of eating disorders, unless your doctor approves.
Supplements · optional, with your doctor’s OK
Not much has earned a place.
- EPA/DHA omega-32–4 g/day of EPA+DHA, with food
Count EPA+DHA on the label, not “fish oil”. High doses slightly raise the risk of atrial fibrillation and add to the effect of blood thinners. Lowers triglycerides, which usually run high with fatty liver. Pooled trials found less liver fat, but not better liver enzymes, and it doesn’t treat the inflammation.
Find it on Amazon: EPA/DHA omega-3 - Vitamin Eonly if your doctor suggests it
Has some evidence in biopsy-proven MASH in people without diabetes, at doses with real long-term questions. Ask your doctor; don’t self-prescribe it.
Retest · Months 3–12
Enzymes first. Scarring later.
- Liver enzymes and fasting insulinat 3 months
Compare with week 0. Falling ALT and insulin mean the liver is emptying.
- Weightagainst the targets
5% lower cuts liver fat. 7–10% improves inflammation. 10% or more gives scarring its best chance to regress.
- FIB-4 or elastographyas your doctor advises, often yearly
Scarring changes slowly. Expect months, not weeks.
- If the numbers won’t moveyour doctor
Take the before-and-after numbers to your doctor. Whether you need medication is their call. Needing it isn’t failure. If FIB-4 or elastography shows significant scarring, there are now approved medications for it. That’s a specialist conversation.
05 The rules
Short list. No exceptions.
Choose
- No alcohol while the liver heals
- Protein and vegetables at every meal, olive oil for fat
- A fixed eating window, and one 36-hour fast a week
- Cardio most days and strength training 2–3 times a week
Avoid
- Sugar, sweet drinks, juice and smoothies
- White flour and packaged snacks
- “Liver detox” products. Your liver does that; these just cost money
- Herbal supplements your doctor hasn’t seen. Some injure the liver
Non-negotiables
- Know your FIB-4 before anything else.
- Talk to a medical doctor before you fast or start a supplement.
- Aim for 7–10% weight loss if you carry excess weight.
- Retest. A liver that feels fine can still be scarring.
06 Checkpoints
What to track, and what good looks like.
Your doctor interprets these with you. These are the thresholds in the North American and European guidelines.
| What | Target | How and when |
|---|---|---|
| FIB-4 | <1.3 (low risk of advanced scarring) | Calculated from routine blood work. Cut-offs differ over 65; ask your doctor. |
| Liver stiffness (elastography) | <8 kPa | FibroScan or similar, if FIB-4 is 1.3 or higher. |
| ALT | Falling, and within your lab’s range | Every 3 months while changing things. |
| Weight | 5% down at least · 7–10% ideal | Weekly, same scale, same time. If you started lean, waist and insulin matter more. |
| HOMA-IR | Under ~1.0 is ideal; over ~2 to 2.5 suggests insulin resistance | Fasting glucose (mmol/L) × fasting insulin (µU/mL) ÷ 22.5. |
| Waist-to-height | <0.5 | Waist at the belly button divided by height, same units. |
Elastography machines and cut-offs vary. Your specialist’s reading wins over this table.
07 Where experts disagree
Where the experts don’t agree.
Everyone agrees weight loss and less alcohol fix most fatty livers. The arguments are about sugar, the best diet, and how soon to reach for a drug.
Is fructose special, or just extra calories?
Fructose is the problem: Lustig
The liver turns fructose into fat in a way it doesn’t with starch. Removing sugar lowers liver fat even when calories and weight stay the same.
It’s the surplus: Sievenpiper and colleagues
Pooled feeding trials found fructose raised liver fat only when it added extra calories. Swapped calorie-for-calorie with other carbs, it didn’t.
Our read Most people eating a lot of sugar are also eating too much. Cutting sugar fixes both, which is why it’s first on the list either way.
Low-carb and fasting, or Mediterranean?
Cut the carbs: Parks and low-carb trialists
A fatty liver makes too much new fat from carbohydrate, so cut the supply. In a two-week trial, a very low-carb diet cut liver fat more than a calorie-cut diet with the same weight loss.
Mediterranean: European liver guidelines
The Mediterranean pattern has the most evidence for liver fat and the heart disease that travels with it. Pair it with a calorie deficit.
Any deficit: Taylor
Liver fat goes when you lose enough weight, by whatever diet you can keep.
Our read This plan uses the overlap: Mediterranean foods, few refined carbs, regular fasting. The amount of liver fat you lose matters more than which label the diet wears.
Now that there are drugs, should lifestyle still come first?
Lifestyle first: AASLD, EASL, Diabetes Canada
Weight loss and diet treat the liver and the heart risk together. Drugs are for people with significant scarring.
Drugs sooner: many hepatologists
Only a minority of people ever lose 10% of their weight and keep it off. With scarring, waiting on lifestyle alone risks progression.
Our read Both are right about different people. No scarring: this plan is the treatment. Scarring: this plan plus whatever your specialist recommends.
08 Limits
What no plan fixes.
Advanced scarring
Cirrhosis rarely reverses. If you already have it, you need a liver specialist, regular cancer screening, and a plan that goes well beyond diet.
Other liver diseases
Hepatitis B and C, iron overload, autoimmune liver disease and some medications also cause liver fat or raised enzymes. Your doctor should rule them out before calling it MASLD.
Genes
Some gene variants (PNPLA3 is the best known) raise the risk of fatty liver and scarring at any weight. They change your odds, not the plan.
The plan empties the liver. It can’t undo cirrhosis.
09 Resources
Worth your time.
Metabolical
Lustig on processed food, fructose and the liver, from a paediatric endocrinologist.
Sources of fatty acids stored in liver and secreted via lipoproteins in patients with nonalcoholic fatty liver disease
The study that measured where liver fat comes from. Small, technical and still the reference point. Open access.
Diabetes and metabolic dysfunction-associated steatotic liver disease in adults
Canadian guidance on screening and treating fatty liver in people with diabetes.
EASL–EASD–EASO clinical practice guidelines on MASLD
The most complete current guideline, open access. Heavy going, but the summary tables are clear.
10 Questions
Questions, answered plainly.
Can fatty liver be reversed?
Often, yes. Liver fat falls within weeks of cutting sugar, alcohol and total intake. Losing 7–10% of your weight improves inflammation, and 10% or more gives early scarring its best chance to regress, though in the main study only a minority lost that much. Results vary, and cirrhosis rarely reverses.
How long does it take to reverse fatty liver?
Liver fat can drop noticeably in days to weeks. Enzymes usually improve within three months. Scarring takes a year or more to regress, if it does.
What’s the difference between NAFLD and MASLD?
Mostly the name. In 2023 international liver societies renamed NAFLD to MASLD to describe the cause (metabolic dysfunction) rather than what it isn’t. Nearly everyone with NAFLD meets the new definition.
Can I drink alcohol with fatty liver?
Best not, while you’re fixing it. With any scarring, guidelines say none at all. Regular drinking above about 10 standard drinks a week for women or 15 for men changes the diagnosis to MetALD, a mix of metabolic and alcohol damage.
Can thin people have fatty liver?
Yes. It’s common in people with a normal BMI who carry fat around the waist or are insulin resistant. Weight-loss targets matter less for them; waist, insulin and diet matter more.
Is there a medication for fatty liver?
For the inflamed, scarred form, yes: Health Canada authorised semaglutide (Wegovy) for MASH with moderate to advanced fibrosis in 2025, and resmetirom is approved in the US. Ask your doctor whether either fits. Neither replaces the plan.
11 Sources
Where this comes from.
Experts drawn on
- Elizabeth Parks, PhD — Professor of nutrition and exercise physiology, and of medicine (gastroenterology and hepatology), University of Missouri. Measures how the liver makes and stores fat.
- Robert Lustig, MD — Paediatric endocrinologist, professor emeritus at UCSF. Researches fructose and liver fat.
- Roy Taylor, MD — Professor of medicine and metabolism, Newcastle University. Showed liver and pancreas fat fall with energy restriction.
- John Sievenpiper, MD, PhD — Clinician-scientist, University of Toronto and St. Michael’s Hospital. Led meta-analyses of fructose and liver fat.
- Mary Rinella, MD — Hepatologist. Led the 2023 AASLD practice guidance and the international renaming to MASLD.
Sources
- A multisociety Delphi consensus statement on new fatty liver disease nomenclature. Journal of Hepatology / Hepatology, 2023.
- AASLD practice guidance on the clinical assessment and management of nonalcoholic fatty liver disease. Hepatology, 2023.
- EASL–EASD–EASO clinical practice guidelines on the management of metabolic dysfunction-associated steatotic liver disease (MASLD). Journal of Hepatology, 2024.
- Diabetes and metabolic dysfunction-associated steatotic liver disease in adults. Diabetes Canada Clinical Practice Guidelines.
- Weight loss through lifestyle modification significantly reduces features of nonalcoholic steatohepatitis. Gastroenterology, 2015.
- Effects of dietary fructose restriction on liver fat, de novo lipogenesis, and insulin kinetics in children with obesity. Gastroenterology, 2017.
- Effect of fructose on markers of non-alcoholic fatty liver disease (NAFLD): a systematic review and meta-analysis of controlled feeding trials. European Journal of Clinical Nutrition, 2014.
- Reversal of type 2 diabetes: normalisation of beta cell function in association with decreased pancreas and liver triacylglycerol. Diabetologia, 2011.
- Sources of fatty acids stored in liver and secreted via lipoproteins in patients with nonalcoholic fatty liver disease. Journal of Clinical Investigation, 2005.
- Increased de novo lipogenesis is a distinct characteristic of individuals with nonalcoholic fatty liver disease. Gastroenterology, 2014.
- Short-term weight loss and hepatic triglyceride reduction: evidence of a metabolic advantage with dietary carbohydrate restriction. American Journal of Clinical Nutrition, 2011.
- Exercise reduces liver lipids and visceral adiposity in patients with nonalcoholic steatohepatitis in a randomized controlled trial. Clinical Gastroenterology and Hepatology.
- Wegovy receives conditional marketing authorization from Health Canada for adults with non-cirrhotic MASH. Novo Nordisk Canada, 2025.
- Omega-3 supplementation and non-alcoholic fatty liver disease: a systematic review and meta-analysis. Journal of Hepatology, 2012.
- Omega-3 fatty acids for the management of hypertriglyceridemia: a science advisory from the American Heart Association. Circulation, 2019.
Not medical advice
Discuss everything here with a medical doctor before acting on it — supplements included. Your doctor has your bloodwork and history. We have neither.