Intake of zero-sugar food and beverages like yoghurt and diet soda may not be good for health as projected as they can impair your liver's ability to flush out toxins, according to a study.

The study, led by a team at the Medical College of Wisconsin in the US, examined two sugar substitutes - acesulfame potassium and sucralose - also known as non-nutritive sweeteners, and provide a sweet taste with few or no calories. These disrupt the function of a protein that plays a vital role in liver detoxification and the metabolism of certain drugs.