Can a festive sugar binge cause fatty liver? Here's what happens inside your body

Festivals in India bring with them an irresistible spread of mithai—from laddoos and barfis to jalebis, gulab jamuns and rasgullas. A few indulgent meals are unlikely to harm an otherwise healthy liver. The concern begins when large amounts of sweets, sugary drinks and calorie-heavy foods become a daily routine for weeks.

The liver plays a major role in processing nutrients, including fructose, a sugar found in table sugar, sweets and sweetened beverages. When the body regularly receives more energy than it needs, some of that excess can be converted into fat and stored in the liver.

How too much sugar affects the liver

After eating sweets, carbohydrates are broken down into sugars that enter the bloodstream. While glucose can be used for energy or stored, fructose is largely processed by the liver.

With sustained high intake of fructose and excess calories, the liver can increase fat production through a process called de novo lipogenesis. Some of that fat may accumulate in liver cells.

Dr Vineet Kumar Gupta, Senior Consultant and Unit Head, ShardaCare - Healthcity, told NDTV, "When you consume a festive overload of sweets, your liver processes the massive surge of refined sugars, specifically fructose. The liver converts excess fructose into fat through a process called de novo lipogenesis."

However, one festive meal does not automatically cause fatty liver. Metabolic dysfunction-associated steatotic liver disease (MASLD), formerly known as NAFLD, is linked to several factors, including excess weight, insulin resistance, type 2 diabetes, abnormal blood lipids, physical inactivity and overall diet.

Can festive indulgence lead to fatty liver?

The bigger issue is a repeated pattern of high sugar and calorie intake. Research has linked frequent consumption of sugar-sweetened beverages and foods containing added fructose with a higher prevalence of fatty liver.

Air Cmde (Dr.) Bhaskar Nandi, Director & Head - Gastroenterology, Hepatology & Endoscopy, Sarvodaya Hospital, Sector-8, Faridabad, told NDTV, "When the body receives more sugar than it needs, the excess can be converted into fat and stored in the liver."

Fat accumulation does not necessarily mean liver inflammation or permanent damage. However, in some people, MASLD can progress to metabolic dysfunction-associated steatohepatitis (MASH), where fat accumulation occurs alongside inflammation and liver-cell injury. Severe liver disease can eventually lead to fibrosis and cirrhosis.

How much sugar is too much?

The World Health Organisation recommends keeping free sugars below 10 per cent of daily energy intake, with further benefits possible when intake is below 5 per cent. For a 2,000-calorie diet, 10 per cent works out to about 50 grams of free sugar.

During festivals, sugar can come from several sources at once—mithai, soft drinks, sweetened tea or coffee, desserts and packaged foods.

People with fatty liver, obesity, type 2 diabetes, insulin resistance or high triglycerides need to be particularly careful about excessive sugar intake. Fatty liver can also be silent, with few or no noticeable symptoms.

How to enjoy sweets without overdoing it

There is no need to completely avoid festive treats. Smaller portions, fewer sugary drinks, balanced meals and regular physical activity can help limit the overall metabolic burden.

Dr Nandi recommends "smaller portions", limiting sugary drinks, balancing sweets with protein- and fibre-rich foods and staying physically active during the festive season.

The key is to keep indulgence occasional rather than turning a few festive days into weeks of excessive sugar and calories.