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Stop eating sugar for 14 days to keep your liver healthy, Harvard-trained doctor explains how

Health risks of eating sugar: When it comes to sugar, most people think about weight. What they don’t realise is that it also impacts other parts of your body, including the liver. A Harvard-trained doctor explained how quitting added sugar for just 14 days can help people with fatty liver.

January 05, 2026 / 15:59 IST
Causes of fatty liver disease: Excess sugar, especially fructose, is preferentially processed by the liver and promotes fat production inside liver cells. This is how fatty liver develops (Image: Pexels)
Snapshot AI
  • Quitting added sugar for 14 days boosts liver health and insulin sensitivity.
  • Benefits: lower triglycerides, less bloating, reduced visceral fat in 2 weeks.
  • Avoid added sugars in drinks, cereals, sauces, and baked goods.

Most people struggle to cut excess sugar from their diet, which is known to cause obesity, a contributing factor to non-alcoholic fatty liver disease (NAFLD). What they don’t know is that quitting sugar even for 14 days can help them a great deal in living a healthy, disease-free life.

In his new post on Instagram, Dr Saurabh Sethi explained how too much sugar not only affects weight but also impacts the liver. “Excess sugar, especially fructose, is preferentially processed by the liver and promotes fat production inside liver cells. This is how fatty liver develops,” he said.

What happens when you quit sugar?

Your body begins to respond differently almost immediately when you skip sugar. Here’s a day-wise breakup of what happens, as explained by Dr Sethi.

First two days

Some of the first things that change include less fructose reaching the liver, a decrease in hepatic fat production, and improved insulin sensitivity. These happen before you notice any weight loss.

From day 3 to 7

In the first week itself, many patients show a reduced hepatic sugar load, lower inflammatory signalling, and improved insulin sensitivity. While this may not yet show up in blood work, it does reflect in liver metabolism.

From day 8 to 14

In the second week, there’s more shift and it includes lower triglycerides, improved fasting glucose, less abdominal bloating, and reduced visceral fat signalling. The liver also begins exporting less fat.

Dr Sethi added that fructose is different from glucose as it skips key insulin control. It is mainly processed in the liver, where excess amounts turn to fat. This is why reducing added sugar helps even without cutting calories.

He clarified that quitting sugar does not imply any extreme measures like keto, zero carb, prolonged fasting, or avoiding whole fruit. The main culprit is added sugar.

Added sugar sources to avoid

Drinks and juices

Flavoured yoghurt

Cereals and bars

Sauces and dressings

Baked goods

Sweetened alcohol

Dr Sethi shared that quitting sugar is highly recommended for people with fatty liver, elevated triglycerides, insulin resistance, abdominal obesity, frequent cravings, and low energy.

Disclaimer: This article, including health and fitness advice, only provides generic information. Don’t treat it as a substitute for qualified medical opinion. Always consult a specialist for specific health diagnosis.

Gursimran Kaur Banga is a Delhi-based content creator, editor and storyteller.
first published: Jan 5, 2026 03:58 pm

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