New Study Links Sugary and Diet Sodas to Liver Disease Risk

A new global study is giving soda drinkers something to think about. Researchers presented findings at the United European Gastroenterology (UEG) Week 2025 in Berlin showing that both sugary and diet sodas are linked to a higher risk of liver disease, even when consumed in modest amounts.

What the Liver Disease Study in 2025 Found

The research found that drinking as little as 9 ounces of a sugary beverage per day raised the risk of metabolic dysfunction-associated steatotic liver disease (MASLD) by 50%. The same amount of a diet soda raised the risk by 60%. A standard can of soda is 12 ounces.

The study, led by Lihe Liu from Soochow University in China, analyzed beverage habits and health data from thousands of adults. The results suggest that even one small can a day may contribute to liver fat buildup and inflammation over time.

Understanding MASLD Liver Disease

Formerly known as non-alcoholic fatty liver disease, MASLD liver disease occurs when excess fat builds up in the liver, not because of alcohol, but because of poor metabolic health. 

It’s now considered the most common liver condition worldwide.

Over time, MASLD can lead to scarring, known as cirrhosis, and increase the risk of liver failure. Experts at the UEG 2025 conference said the findings reinforce how small dietary habits can have lasting effects on liver health.

Diet Soda Health Risks

Diet drinks have long been marketed as a smarter choice, but this study suggests that diet soda health risks may be greater than previously believed. 

Artificially sweetened beverages appear to disrupt metabolism in ways similar to sugary sodas, raising concerns for those who drink them daily.

“The assumption has been that diet sodas are a safe alternative, but we are finding that is not necessarily the case,” Liu said in a statement shared by UEG.

Sugary Drinks and Liver Health

Health professionals have been warning us about sugary drinks and liver problems for a long time. Sugars such as fructose and high-fructose corn syrup are primarily processed in the liver, where they can promote fat accumulation. 

Over time, that buildup can trigger metabolic inflammation and increase the risk of MASLD.

Registered dietitians recommend limiting sweetened beverages to occasional treats and replacing them with water, sparkling water, or unsweetened tea whenever possible.

UEG Week 2025: Global Nutrition Focus

This year’s UEG Week 2025 conference placed a strong emphasis on nutrition and public health. Many researchers presented evidence linking processed foods and sweetened beverages to metabolic disorders.

Health experts from the World Health Organization (WHO) echoed these concerns, noting that liver-related diseases tied to diet are rising sharply across Europe and North America.

What To Do Instead

While the occasional soda is unlikely to cause us any harm, experts agree that moderation is key. A glass of water or herbal tea can satisfy our thirst without burdening our livers. 

And, if you like carbonation, sparkling water with a splash of citrus is a nice, fizzy alternative.

Still, whether it’s sugar-sweetened or sugar-free, moderation matters. The latest science seems to agree that both kinds of soda can strain the liver, especially when they’re consumed daily.

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