Is Mayonnaise Good for Fatty Liver?

Is mayonnaise good for fatty liver disease? In short, regular full-fat mayonnaise is not an ideal choice for people managing this condition. While an occasional small serving is unlikely to cause significant harm on its own, mayonnaise is calorie-dense and, when eaten regularly, can hinder the modest weight loss that benefits liver health. Understanding which ingredients in mayonnaise affect the liver, what foods to limit, and what the NHS recommends can help you make practical, evidence-based dietary choices to support your liver health.

Is mayonnaise bad for a fatty liver?

Regular full-fat mayonnaise is not helpful for fatty liver disease as it is calorie-dense and can hinder weight loss; occasional small amounts are unlikely to cause significant harm on their own.

Regular full-fat mayonnaise is not a helpful food choice for people with fatty liver disease, primarily because it is calorie-dense. Eaten frequently and in large portions, it can make it harder to achieve the modest weight loss that benefits liver health. That said, mayonnaise consumed occasionally and in small amounts is unlikely to cause significant harm on its own. The concern arises when it forms a regular part of a diet that is already high in processed foods, refined carbohydrates and added sugars, all of which are associated with the progression of metabolic dysfunction-associated steatotic liver disease (MASLD). MASLD is the term now widely adopted in UK and international clinical practice in place of the older label non-alcoholic fatty liver disease (NAFLD); both terms may appear in older NHS letters and documents.^[1][5]

Fatty liver disease is closely linked to excess body weight, insulin resistance and poor dietary patterns. NICE guidance (NG49) on non-alcoholic fatty liver disease notes that weight loss is beneficial for liver health in people who are overweight, with a reduction of around 5 to 10 per cent of body weight associated with improvements in liver fat and, at the higher end, in liver inflammation. The key principle is overall dietary quality rather than the elimination of any single condiment. However, for people actively trying to improve their liver health, reducing high-calorie condiments such as standard mayonnaise is a practical and worthwhile step.

What fats and ingredients in mayonnaise affect liver health?

The key concerns are energy density, refined vegetable oils, and added sugars such as glucose-fructose syrup, which is metabolised in the liver and may contribute to liver fat accumulation.

Standard mayonnaise contains several ingredients that are relevant to liver health, most notably refined vegetable oils, egg yolks, and in many commercial varieties, added sugar and salt. The type and quantity of fat in mayonnaise varies considerably between products. Many UK commercial mayonnaises are made predominantly with rapeseed oil, which is relatively high in monounsaturated fat and contains some omega-3 fatty acids, making it a more favourable oil than sunflower oil from a fatty acid profile perspective. Sunflower oil-based mayonnaises are higher in omega-6 polyunsaturated fatty acids. While omega-6 fats are not inherently harmful, some evidence suggests that a diet with a high ratio of omega-6 to omega-3 fatty acids may be associated with low-grade inflammation; however, this evidence is not conclusive and the overall dietary pattern matters more than any single ingredient.^[13]

Some mayonnaise products contain a proportion of saturated fat, particularly those made with blended fats or certain emulsifiers. Research suggests that high saturated fat intake can promote hepatic lipogenesis, the process by which the liver converts excess nutrients into fat, though the primary concern with mayonnaise for most people is its energy density rather than its saturated fat content specifically.^[14]

Added sugars are also worth checking on the label. Some commercial brands contain glucose-fructose syrup (the UK labelling term for what is sometimes called high-fructose corn syrup in other markets). Excess free sugar intake, particularly from sugar-sweetened drinks and highly processed foods, is associated with increased liver fat because fructose is metabolised largely in the liver; however, the risk relates to overall free sugar intake rather than to any single ingredient in isolation.^[15]

Reading the nutrition label is therefore important. A standard tablespoon (approximately 15 g) of full-fat mayonnaise typically contains around 90 to 100 kilocalories and 9 to 11 g of fat, though figures vary between brands; these are illustrative values based on typical UK product labels. Reduced-fat versions contain fewer calories but often compensate with higher sugar or starch content, so they are not automatically a better choice for liver health without checking the label carefully.

Which foods should you avoid or limit with fatty liver disease?

People with fatty liver disease should limit ultra-processed foods, sugary drinks, refined carbohydrates, alcohol and high-fat condiments, as these promote liver fat, insulin resistance and inflammation.

People with fatty liver disease are advised to limit or avoid several categories of food that promote fat storage in the liver, worsen insulin resistance or drive systemic inflammation. The most important groups to reduce include:

• Ultra-processed foods: ready meals, fast food, processed meats and packaged snacks tend to be high in refined carbohydrates, saturated fat, salt and additives. NHS and British Liver Trust guidance consistently highlights these as foods to limit.

• Sugary drinks and foods: fizzy drinks, sweets, cakes and biscuits are high in free sugars, which are associated with increased liver fat. If fruit juice is consumed, NHS guidance recommends limiting it to no more than 150 ml per day and choosing water or unsweetened drinks instead.^[7][8]

• Refined carbohydrates: white bread, white rice and pastries cause rapid rises in blood glucose and insulin, promoting fat deposition in the liver.

• Alcohol: even modest alcohol intake can worsen liver inflammation and fat accumulation. The UK Chief Medical Officers' low-risk drinking guideline advises no more than 14 units per week spread over several days, with several alcohol-free days each week.^[10] Many people with MASLD are advised by their clinical team to avoid alcohol altogether, as there is no established safe level for those with existing liver disease.

• High-fat condiments and sauces: this includes standard mayonnaise, creamy dressings, butter-based sauces and similar products used in large quantities.

It is worth noting that no single food causes or cures fatty liver disease in isolation. The overall dietary pattern is what matters most. A diet consistently high in the foods listed above, combined with physical inactivity, creates the metabolic conditions in which fatty liver disease develops and progresses. Reducing these foods as part of a broader shift towards a whole-food, plant-forward diet is the approach most supported by current evidence and aligned with NHS dietary guidance.

What does the NHS recommend eating if you have a fatty liver?

The NHS recommends a balanced diet based on the Eatwell Guide, emphasising vegetables, wholegrains, lean protein and unsaturated fats, with a Mediterranean-style dietary pattern particularly supported by clinical evidence.

The NHS recommends that people with fatty liver disease follow a balanced, healthy diet and aim to lose weight gradually if they are overweight, as even a 5 per cent reduction in body weight can reduce liver fat (NICE NG49). The dietary approach most consistently supported by evidence and reflected in NHS and NICE guidance is one based on whole, minimally processed foods, with an emphasis on vegetables, fruit, wholegrains, lean protein and healthy unsaturated fats, in line with the NHS Eatwell Guide.

Specifically, the NHS advises:

• Eating plenty of vegetables and fruit, aiming for at least five portions a day.

• Choosing wholegrains such as oats, brown rice, wholemeal bread and lentils over refined carbohydrates.

• Including lean protein from sources such as fish, poultry, legumes and low-fat dairy.

• Using unsaturated fats from sources such as olive oil, avocado and oily fish, in moderate amounts.

• Reducing free sugars, including those in drinks, sauces and processed foods.

• Limiting alcohol or avoiding it entirely.

A Mediterranean-style dietary pattern is frequently cited in clinical literature and international guidelines (including EASL/EASD/EASO guidance on MASLD) as particularly beneficial for people with fatty liver disease. It emphasises olive oil, vegetables, legumes, wholegrains and fish, while limiting red meat and processed foods, and aligns closely with the principles above. Regular physical activity, aiming for at least 150 minutes of moderate-intensity exercise per week as per NHS guidelines, complements dietary changes and has been shown in research to improve liver fat levels independently of weight loss.^[11][12]

Healthier alternatives to mayonnaise for a fatty liver diet

Extra virgin olive oil, plain low-fat Greek yoghurt, avocado, and hummus are practical lower-calorie alternatives to mayonnaise that provide more favourable fats and nutrients.

Several lower-calorie, lower-fat alternatives to standard mayonnaise can be used in cooking and at the table without significantly compromising flavour, making them more suitable for people managing fatty liver disease. The best options depend on how mayonnaise is being used, whether as a spread, a dressing base or a dip.

Practical alternatives include:

• Extra virgin olive oil with lemon juice or vinegar: a simple dressing that provides monounsaturated fats. International guidelines on MASLD, including EASL/EASD/EASO guidance, support olive oil as a healthier fat choice within an overall dietary pattern, and it is a cornerstone of the Mediterranean diet.^[12]

• Plain low-fat Greek yoghurt: a good base for dips and dressings, providing protein with considerably less fat than mayonnaise. Some emerging research suggests gut microbiome health may influence liver disease progression, though this is not yet a current NICE recommendation and should not be taken as a treatment approach.^[16][17]

• Avocado or guacamole: rich in monounsaturated fats and fibre, avocado is a nutrient-dense spread and a healthier fat choice within an overall balanced diet when eaten in moderate portions.

• Hummus: made from chickpeas and tahini, hummus provides plant protein, fibre and unsaturated fats, and works well as a spread or dip.

• Reduced-fat mayonnaise: if mayonnaise is preferred, a reduced-fat version used sparingly is a reasonable compromise, though the label should be checked for added sugars and total calories.

When choosing any condiment or dressing, checking the nutrition label for total calories, saturated fat and free sugar content per serving is a practical habit. Small, consistent changes to condiment choices, alongside broader dietary improvements, can meaningfully support liver health over time without requiring a complete overhaul of eating habits.

When should you see a GP about fatty liver disease?

See your GP if you have fatty liver disease without dietary advice, or if you develop jaundice, abdominal swelling, unexplained weight loss or persistent fatigue, as these may indicate progression.

You should see your GP if you have been told you have fatty liver disease and have not yet received dietary or lifestyle advice, or if you are concerned that your condition may be progressing. Fatty liver disease is often detected incidentally during an ultrasound or blood test carried out for another reason, and many people are unaware they have it. In its early stages it typically causes no symptoms, but without lifestyle changes it can progress to more serious liver conditions including fibrosis, cirrhosis and, in some cases, liver failure.

Contact your GP if you experience any of the following:

• Persistent fatigue or abdominal discomfort in the upper right side.

• Unexplained weight loss.

• Yellowing of the skin or whites of the eyes (jaundice).

• Swelling of the abdomen or legs.

• Any new or worsening symptoms that concern you.

Your GP can arrange blood tests to assess liver function and, in line with NICE guidance (NG49 and DG34), may use non-invasive scoring tools to assess the degree of liver fibrosis. In primary care, the FIB-4 score (calculated from age, liver enzyme levels and platelet count) is commonly used as an initial assessment, with age-specific cut-off values guiding further investigation.^[1][3] Where the result is uncertain, a second-line test such as the Enhanced Liver Fibrosis (ELF) test may be used. These results help determine whether referral to a hepatologist is needed. Local referral criteria and pathways may vary by Integrated Care Board (ICB), so your GP will follow the pathway in your area. A referral to a registered dietitian can provide personalised dietary guidance if you are managing your diet independently and are unsure whether your approach is appropriate.

For urgent symptoms such as sudden severe abdominal pain, vomiting blood or confusion, call 999 or go to your nearest accident and emergency department immediately. For non-emergency concerns outside GP hours, NHS 111 can provide advice. Suspected side effects from any medication used in the management of related conditions can be reported via the MHRA Yellow Card scheme at https://yellowcard.mhra.gov.uk.

Scientific References

1. Metabolic dysfunction-associated steatotic liver disease (formerly NAFLD) [NG49].
2. Metabolic dysfunction-associated steatotic liver disease – recommendations for research [NG49].
3. MRI-based technologies for assessing non-alcoholic fatty liver disease [HTG655] – Chapter 2: The diagnostic tests.
4. Non-alcoholic fatty liver disease (NAFLD).
5. Understanding the evolving nomenclature of steatotic liver disease.
6. Global epidemiological patterns and disease burden of metabolic dysfunction-associated steatotic liver disease, metabolic dysfunction and alcohol-associated liver disease, and alcohol-associated liver disease.
7. Sugar: the facts.
8. 5 A Day portion sizes.
9. The Eatwell Guide.
10. Alcohol consumption: advice on low risk drinking.
11. Physical activity guidelines for adults aged 19 to 64.
12. EASL-EASD-EASO Clinical Practice Guidelines on the management of metabolic dysfunction-associated steatotic liver disease.
13. Obesity is the culprit behind fatty acid-induced inflammation.
14. Lipid metabolic reprogramming and bioactive lipid signaling in MASLD: molecular mechanisms, pathogenesis and therapeutic opportunities.
15. CYP450 network shifts in MASLD/MASH: from pathogenesis to nutrition-informed modulation.
16. Meta-analysis of the effectiveness of fecal microbiota transplantation in the treatment of metabolic-associated fatty liver disease.
17. Trust your gut: exploring the connection between gut microbiome dysbiosis and the advancement of MASLD/MASH.

Frequently Asked Questions