Late-Night Eating and Artificial Sweeteners Linked to Increased Liver Disease Risk, Study Finds

New research indicates that eating late at night and consuming artificial sweeteners in diet drinks may significantly increase the risk of developing liver disease. The findings suggest that lifestyle factors, beyond alcohol intake, play a crucial role in liver health.

A study from Oregon Health & Science University analyzed the eating habits of nearly 200,000 individuals and found a 20% to 30% rise in liver disease cases among those who ate late at night. This late-night eating was defined as consuming food after dinner or after a person's usual bedtime. Researchers hypothesize this link could be related to the liver's circadian rhythm. During the day, the liver efficiently processes nutrients, regulates blood sugar, and metabolizes fat. However, at night, when the body expects to fast, these metabolic processes slow down, potentially leading to increased fat storage when food is consumed.

Beyond meal timing, the choice of beverages also appears to impact liver health. A separate study by Chinese researchers revealed that daily consumption of low or non-sugar-sweetened drinks, such as diet soda, increased the risk of fatty liver disease by 60%. For comparison, regular consumption of sugar-sweetened beverages showed a 50% higher risk. While sugar can overwhelm the liver, artificial sweeteners may alter gut bacteria and interfere with metabolic processes, potentially promoting inflammation and fat accumulation in the liver. Water remains the healthiest beverage choice, aiding the liver and kidneys in waste removal without added sugars, sweeteners, or additives.

Metabolic dysfunction-associated steatotic liver disease (MASLD), previously known as non-alcoholic fatty liver disease, has seen a 143% increase over the past three decades, coinciding with a decline in alcohol consumption. This condition occurs when excess fat builds up in the liver, which can lead to scarring, cirrhosis, liver failure, and liver cancer.

Dietary adjustments may also play a role in managing existing liver fat. Research suggests that a low-carbohydrate diet, rich in foods like meat, eggs, and dairy, led to a 67% reduction in liver fat within five months for individuals with fatty liver disease. In contrast, those following a Mediterranean diet saw a roughly 45% decrease in liver fat. Experts believe that reducing carbohydrate intake helps lower glucose and insulin spikes, preventing excess sugar from being converted to fat in the liver. However, the emphasis remains on healthy fats from sources like olive oil, nuts, seeds, and oily fish, as processed meats have been linked to other health concerns.

Weight management is also critical for liver health. Losing as little as 5% of body weight can begin to reduce liver fat, with losses of 10% or more potentially reversing inflammation and scarring. Gradual, sustainable weight loss through reduced portion sizes and a balanced diet is recommended over crash dieting.

Certain supplements can also pose a risk to liver health. High doses of fat-soluble vitamins like Vitamin A, as well as some herbal remedies such as ashwagandha and green tea extract, can become toxic because the liver is responsible for processing them. The LiverTox database, maintained by the U.S. National Institutes of Health, indicates that herbal and dietary supplements contribute to a growing number of liver toxicity cases. Health professionals recommend a 'food-first' approach to nutrient intake.

Conversely, coffee consumption has been associated with improved liver function and a reduced risk of liver disease. Studies suggest that coffee's antifibrotic properties may help prevent and reduce scar tissue in the liver, potentially lowering the risk of cirrhosis and liver cancer. Even decaffeinated coffee has shown benefits in preventing liver cancer.