An analysis of more than 6,300 adults with fatty liver disease found the strongest survival association at about 2.14 grams of omega-3 intake per day, with much of the omega-3 consumed in the plant-derived form alpha-linolenic acid.
By yourNEWS Media Newsroom
A dietary analysis following more than 6,300 adults with fatty liver disease for nearly a decade found that omega-3 intake was associated with a lower risk of death, with the strongest association occurring around 2.14 grams per day.
The findings add to research examining nutrition and metabolic dysfunction-associated steatotic liver disease, or MASLD, the condition formerly widely known as nonalcoholic fatty liver disease.
MASLD has become increasingly common alongside obesity, insulin resistance and Type 2 diabetes. Estimates cited in the analysis indicate that the condition affects roughly four in 10 adults worldwide.
Researchers examined participants’ diets and long-term survival and found that the relationship between omega-3 consumption and mortality was not linear.
Risk was higher among people consuming less than approximately 2.14 grams per day, while intake above that level was not associated with additional survival benefit.
Because the study was observational, the findings identify an association and do not establish that consuming a specific amount of omega-3 will prevent death or treat fatty liver disease.
Much of the omega-3 consumed by participants came from alpha-linolenic acid, or ALA, a plant-derived essential fatty acid present in foods including flaxseed, chia seeds, walnuts and some plant oils.
A tablespoon of ground flaxseed can provide approximately the amount of ALA corresponding to the intake level associated with the strongest survival findings in the analysis.
That does not mean a tablespoon of flaxseed constitutes a treatment dose. Individual nutritional needs, overall diet, medications and existing medical conditions can affect appropriate dietary choices.
Plant and marine sources also provide different types of omega-3 fatty acids.
Flaxseed and chia primarily contain ALA, while fish and seafood can supply the longer-chain omega-3 fats EPA and DHA. The body can convert some ALA into EPA and DHA, although the conversion is limited.
Separate clinical research has examined flaxseed specifically in people with fatty liver disease.
In one 12-week trial involving 50 adults with nonalcoholic fatty liver disease, participants who consumed two tablespoons of ground flaxseed per day along with standard health education experienced greater reductions in liver fat measured by MRI than the comparison group.
The survival analysis and flaxseed trial examined different outcomes and should not be interpreted as showing that flaxseed alone prevents complications from fatty liver disease.
The research comes amid growing concern about the burden of metabolic liver disease.
The liver performs numerous essential functions, including processing nutrients, regulating blood glucose and cholesterol, producing proteins involved in blood clotting, storing vitamins and chemically modifying substances so they can be eliminated from the body.
Fat accumulation in the liver is strongly associated with broader metabolic dysfunction.
A large majority of people with obesity can develop fatty liver disease, while the condition is also common among people with Type 2 diabetes. Insulin resistance, abnormal blood lipids and excess body weight have long been recognized as important risk factors.
Those relationships have led clinicians to increasingly view fatty liver disease as part of a broader metabolic disorder rather than an isolated liver problem.
Advanced disease can progress from simple liver fat accumulation to inflammation, fibrosis, cirrhosis and, in some patients, liver cancer.
Worldwide liver cancer mortality has also risen substantially during the past several decades. Data cited in the analysis estimated approximately 484,000 liver cancer deaths in 2021, more than double the number recorded in 1990.
Not every person with MASLD develops liver cancer, however, and liver cancer has multiple causes, including chronic hepatitis infections, alcohol-related liver disease and other conditions.
Dietary patterns are among several factors researchers are studying in connection with MASLD.
High consumption of sugar-sweetened beverages and excess calories can promote the accumulation of fat in the liver, particularly when combined with insulin resistance and weight gain.
Fructose is largely metabolized by the liver, and diets containing large quantities of added sugar have been associated with metabolic problems and liver fat accumulation.
Highly processed foods, refined carbohydrates and calorie-dense snacks can also contribute to excess energy consumption and weight gain.
Some nutrition commentators have additionally raised concerns about highly refined seed oils and dietary omega-6 fatty acids. Evidence regarding individual cooking oils and inflammatory effects is more complex than claims that all seed oils are inherently harmful, however, and the health effects depend on the specific oil, overall dietary pattern and what foods those fats replace.
Alcohol represents another important source of liver stress.
The liver is primarily responsible for metabolizing alcohol, and regular or heavy consumption can contribute to liver inflammation, fat accumulation and progressive liver disease.
For people diagnosed with MASLD, alcohol recommendations can vary depending on the severity of the disease and other medical factors.
The condition frequently produces few or no symptoms in its earlier stages.
Fatigue or discomfort in the upper-right abdomen can occur, but nonspecific complaints such as brain fog, itching or dark circles cannot diagnose fatty liver disease. Diagnosis generally relies on medical history, laboratory testing and imaging, with additional testing sometimes required to assess fibrosis or other complications.
Research into dietary approaches has increasingly focused on changes that improve overall metabolic health rather than individual “superfoods.”
Regular physical activity, weight management when appropriate, reducing excessive added sugar and limiting alcohol can improve metabolic risk factors associated with fatty liver disease.
Vegetables, whole grains, legumes, nuts, seeds and other minimally processed foods can form part of dietary patterns associated with better cardiometabolic health.
The new omega-3 findings suggest that plant-derived ALA may warrant additional study in people with MASLD.
Jonathan Landsman, creator of the Fatty Liver Docu-Class, has separately discussed the liver’s role in processing chemicals and preparing substances for elimination from the body. He has described sweating, urination and bowel movements as natural routes through which the body eliminates waste.
Claims that people must undertake special daily “detoxification” programs, however, go beyond the liver’s established physiological functions. In healthy people, the liver, kidneys, lungs and gastrointestinal system continuously process and eliminate metabolic waste without requiring commercial detox products or programs.
Dandelion root and other herbal products are also sometimes promoted for liver or kidney health. Traditional use does not establish that such supplements treat MASLD, and herbal products can interact with medications or pose risks for people with certain medical conditions.
The growing prevalence of fatty liver disease has also prompted scrutiny of the food environment.
One teenager from Pennsylvania has sued major food manufacturers, alleging that ultra-processed products contributed to his development of fatty liver disease, Type 2 diabetes and other medical problems. Those allegations are part of litigation and do not by themselves establish that the companies legally caused his illnesses.
The omega-3 analysis nevertheless adds another piece to the developing research on diet and MASLD.
Its most notable finding was not that progressively higher omega-3 intake produced progressively better outcomes. Instead, researchers observed the strongest survival association near 2.14 grams per day, after which additional intake was not associated with further benefit.
The results support further investigation into ALA-rich foods such as ground flaxseed and chia seeds while stopping short of proving that a particular food or omega-3 dose can prevent death from fatty liver disease.
For people with diagnosed liver disease, dietary changes are best considered alongside medical evaluation of liver function, fibrosis risk, diabetes, cholesterol, body weight and other conditions that can affect the course of MASLD.
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