Did you know that diet plays a crucial role in maintaining liver health? A healthy diet can help prevent liver diseases, support liver functions, and even aid in the recovery of a damaged liver. This article lists some dietary guidelines and healthy foods that can promote liver health.
Importance of liver health
The liver is a vital organ in the human body that is responsible for various functions, such as filtering toxins from the blood, metabolizing fats, carbohydrates, and proteins, regulating sugar and cholesterol levels, and aiding in digestion. Therefore, it is really important to select foods that support the optimal health of your liver. A well-balanced diet can support liver functions and help prevent liver diseases or aid in their management.
What are the main functions of the liver?
- Production of Bile
The liver creates a special liquid called bile, which helps your body digest fatty foods.
- Cleaning Blood
The liver helps clean your blood by removing a waste substance called bilirubin.
- Detoxification
When you consume things that might harm your body, such as alcohol or certain medicines, the liver processes them to make them safe and then gets rid of them.
- Balancing Blood Sugar
The liver helps control the amount of sugar in your blood, adding sugar when needed and taking it away when there's too much.1
The impact of diet on liver health
Maintaining a healthy liver requires a high-quality diet. It is crucial to consume foods packed with antioxidants, fibres, healthy fats, vitamin B, vitamin C, minerals, and those that enhance glutathione production.
What are the key nutrients for liver health?
Antioxidants
Antioxidants are compounds that help neutralize harmful free radicals in the body, reducing inflammation and oxidative stress.2
Fibres
High-fiber foods like legumes, fruits, and vegetables can aid in weight management and promote healthy digestion. Maintaining a healthy weight is important for liver health, as obesity is a risk factor for liver diseases such as non-alcoholic fatty liver disease (NAFLD).3
Proteins
Proteins are essential for overall health and can be beneficial for individuals with liver disease, as they support the repair and regeneration of liver tissues.
Healthy fats
Incorporating healthy fats, such as those found in avocados, nuts, seeds, and fatty fish, can help reduce inflammation and support liver function. Omega-3 fatty acids, in particular, have been associated with improved liver health.
Common liver health problems
When the liver is overwhelmed with toxins or damaged due to poor dietary choices and lifestyle factors, it can lead to various liver diseases, including fatty liver disease, hepatitis, and cirrhosis.4 These conditions can significantly impact our health and quality of life, emphasizing the importance of maintaining a healthy liver through proper nutrition.
So, what are the best foods for your liver?
Fruits and vegetables
Berries
Berries are high in fibre and antioxidants, which are beneficial for liver health. For example, test-tube studies have shown that blueberry extract may inhibit the growth of human liver cancer cells.5
Leafy greens
Vegetables like kale and spinach are high in antioxidants and fibres, which can aid in detoxification.
Cruciferous vegetables
Glucosinolates are compounds found in cruciferous vegetables such as broccoli, Brussels sprouts, swede, and turnips.
Whole grains
Foods like quinoa, brown rice and oats provide fibre and complex carbohydrates, which can stabilize blood sugar levels. Eating whole-grain, high-fiber foods such as oatmeal is linked to a lower likelihood of developing NAFLD-related diseases.6
Fish
Oily fish, such as salmon, sardines and trout, are high in omega-3 fatty acids, which can reduce fat accumulation and inflammation in the liver. A healthy, balanced diet should include one to two portions of oily fish a week.7
Lean protein
Incorporating lean protein sources like poultry, tofu, and beans can help repair liver cells and maintain proper liver function.
Nuts
Almonds and walnuts are good sources of antioxidants, healthy fats and vitamin E, which are beneficial for liver health. Walnuts have the greatest amount of omega-6 and omega-3 fatty acids, which aid in the reduction of fatty liver disease.8
Herbs and spices
Curcumin, a compound in turmeric, has anti-inflammatory and antioxidant effects that may benefit the liver. Research evidence demonstrated that curcumin treatment significantly improved NAFLD severity compared to the placebo group.9 Besides turmeric, consider incorporating herbs and spices like ginger, garlic, cinnamon, and cilantro into meals for potential liver-protective benefits.
Coffee
Coffee has been the subject of various studies regarding its potential benefits for liver health. Research findings suggest that moderate coffee consumption may have protective effects on developing a common type of liver cancer.10 It may also have positive effects on liver disease and inflammation.11 However, it is crucial to emphasize moderation when it comes to coffee consumption. While moderate coffee consumption appears to have potential benefits for liver health, excessive intake can have adverse effects on overall health.
Green tea
Green tea contains catechins, which have antioxidant properties that may improve liver functions and reduce the risk of liver disease. There is evidence to suggest that people who consume green tea are less likely to develop liver cancer.12
What foods to avoid?
Excessive salt
Consuming too much salt can upset the body's fluid balance and elevate blood pressure. High salt intake has been associated with NAFLD.13 Processed foods like crisps, ready meals, and instant noodles are often high in salt, so reducing their consumption is a good way to lower salt intake and promote better liver health.
Reduce fried and processed foods
Fried foods are typically high in saturated fats and can contribute to inflammation and scarring of the liver over time. Saturated fats are known to promote the accumulation of fat in the liver, which is a key factor in the development of NAFLD.
Limit red meat consumption
Consuming red meat, particularly when it is high in saturated fat, has been associated with an increased risk of fatty liver disease.14 White meats like chicken and turkey are generally lower in saturated fat and can be healthier choices for those concerned about liver health.
Limit alcohol intake
Excessive alcohol consumption can harm the liver, so it's advisable to limit or avoid alcohol. It is recommended to limit alcohol intake to one drink per day for people assigned female at birth and two drinks per day for people assigned male at birth.15
What else can you do for a healthy liver?15
Maintain a healthy weight
Being overweight or obese increases the risk of fatty liver disease and other liver conditions. Aim for a well-rounded, healthy weight by adopting a balanced nutritional intake and engaging in consistent physical activity.
Portion control
Portion control is important for maintaining a healthy liver because it helps prevent overeating and excessive calorie intake, which can contribute to obesity and fatty liver disease.
Hydration
Drinking plenty of water helps your liver function properly by assisting in the detoxification process.
Regular exercise
Physical activity can help improve overall health, including liver health. Strive to engage in at least two and a half hours of aerobic exercise at a moderate intensity level every week.
Reduce stress
Chronic stress can impact liver health. Practising stress-reduction techniques like yoga,meditation or spending time in nature can be beneficial.
Summary
Maintaining a healthy liver is crucial for our overall well-being, as this vital organ plays a central role in numerous bodily functions. By incorporating a diet rich in healthy foods, liver function can be supported, reducing the risk of liver diseases and promoting optimal health. Leafy greens, cruciferous vegetables, fruits, spices, and a balanced intake of proteins and fats all contribute to liver health. Moreover, staying hydrated and avoiding excessive consumption of alcohol and processed foods are essential steps in preserving liver health. A liver-healthy diet is a cornerstone of a healthy life, and it is within our reach to make the choices that benefit our liver and, consequently, our overall well-being.
References
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- Ali SS, Ahsan H, Zia MK, Siddiqui T, Khan FH. Understanding oxidants and antioxidants: Classical team with new players. J Food Biochem. 2020 Mar;44(3):e13145.
- Liver disease diets: fatty liver diet and more [Internet]. 2022 [cited 2023 Sep 14]. Available from: https://liverfoundation.org/health-and-wellness/healthy-lifestyle/liver-disease-diets/
- nhs.uk [Internet]. 2017 [cited 2023 Sep 14]. Hepatitis. Available from: https://www.nhs.uk/conditions/hepatitis/
- Wang H, Guo X, Hu X, Li T, Fu X, Liu RH. Comparison of phytochemical profiles, antioxidant and cellular antioxidant activities of different varieties of blueberry (Vaccinium spp.). Food Chemistry [Internet]. 2017 Feb 15 [cited 2023 Sep 14];217:773–81. Available from: https://www.sciencedirect.com/science/article/pii/S0308814616313851
- Dorosti M, Jafary Heidarloo A, Bakhshimoghaddam F, Alizadeh M. Whole-grain consumption and its effects on hepatic steatosis and liver enzymes in patients with non-alcoholic fatty liver disease: a randomised controlled clinical trial. Br J Nutr. 2020 Feb 14;123(3):328–36.
- nhs.uk [Internet]. 2022 [cited 2023 Sep 14]. Fish and shellfish. Available from: https://www.nhs.uk/live-well/eat-well/food-types/fish-and-shellfish-nutrition/
- Gupta V, Mah XJ, Garcia MC, Antonypillai C, van der Poorten D. Oily fish, coffee and walnuts: Dietary treatment for nonalcoholic fatty liver disease. World J Gastroenterol [Internet]. 2015 Oct 7 [cited 2023 Sep 14];21(37):10621–35. Available from: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4588084/
- Panahi Y, Valizadegan G, Ahamdi N, Ganjali S, Majeed M, Sahebkar A. Curcuminoids plus piperine improve nonalcoholic fatty liver disease: A clinical trial. J Cell Biochem. 2019 Sep;120(9):15989–96.
- Wadhawan M, Anand AC. Coffee and liver disease. J Clin Exp Hepatol [Internet]. 2016 Mar [cited 2023 Sep 14];6(1):40–6. Available from: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4862107/
- Saab S, Mallam D, Cox GA, Tong MJ. Impact of coffee on liver diseases: a systematic review. Liver Int. 2014 Apr;34(4):495–504.
- Ni CX, Gong H, Liu Y, Qi Y, Jiang CL, Zhang JP. Green tea consumption and the risk of liver cancer: a meta-analysis. Nutr Cancer. 2017;69(2):211–20.
- Gao P, You M, Li L, Zhang Q, Fang X, Wei X, et al. Salt-induced hepatic inflammatory memory contributes to cardiovascular damage through epigenetic modulation of sirt3. Circulation. 2022 Feb;145(5):375–91.
- Rahimi-Sakak F, Maroofi M, Emamat H, Hekmatdoost A. Red and processed meat intake in relation to non-alcoholic fatty liver disease risk: results from a case-control study. Clin Nutr Res [Internet]. 2022 Jan 26 [cited 2023 Sep 14];11(1):42–9. Available from: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8844531/
- Facts about moderate drinking | CDC [Internet]. 2022 [cited 2023 Sep 14]. Available from: https://www.cdc.gov/alcohol/fact-sheets/moderate-drinking.htm
- Healthy liver - 13 tips on how to have a healthy liver [Internet]. 2021 [cited 2023 Sep 14]. Available from: https://liverfoundation.org/resource-center/blog/13-ways-to-a-healthy-liver/