Do Dietitians Recommend Artificial Sweeteners?

Artificial sweeteners are often a controversial topic in nutrition, with strong opinions from different perscpectives. Some people see them as a helpful tool to reduce sugar and calorie intake, whilst others worry about their potential negative health effects. The truth is more complex, and dietitians typically take an individualized approach rather than giving a simple yes or no answer.

"When it comes to weight loss, artificial sweeteners can help reduce overall calorie intake..."

Artificial sweeteners are officially defined by regulatory bodies, such as the FDA, as a chemically synthesized substance that mimics the taste of sugar while providing negligible or no calories. They are often much sweeter than normal table sugar. They are often used to provide a sweet taste to food items and beverages- labelled “zero sugar”. Examples of artificial sweeteners include Aspartame, Saccharin, Acesulfame potassium, Sucralose, Neotame and Advantame.

Dietitians rarely give blanket recommendations when it comes to artificial sweeteners. Instead, advice depends on the individual, their health goals, and any underlying medical conditions. Three common scenarios where sweeteners are considered include diabetes mellitus, irritable bowel syndrome, and weight management.

For individuals with diabetes, artificial sweeteners can be a useful tool. Because they do not significantly raise blood glucose levels, they can help reduce overall carbohydrate intake and improve glycaemic control. For someone who regularly consumes sugary drinks or adds sugar to tea and coffee, switching to a low-calorie sweetener can make a meaningful difference.

In contrast, for individuals with IBS or other gut-related issues, certain sweeteners may worsen symptoms. Sugar alcohols such as sorbitol, mannitol, and xylitol are known to be poorly absorbed and can cause bloating, gas, and diarrhoea. These fall under the FODMAP category and are often restricted in IBS management. Even some non-nutritive sweeteners may affect gut sensitivity in certain individuals, so tolerance needs to be assessed on a case-by-case basis.

When it comes to weight loss, artificial sweeteners can help reduce overall calorie intake if they replace high-sugar foods and beverages. For example, swapping regular soda for a diet version can significantly cut daily energy intake. However, they are not a magic solution. Some individuals may compensate by eating more elsewhere, or maintain a strong preference for sweet foods, which can make long-term dietary changes more challenging. Behavioural patterns and overall diet quality still matter most.

A recent common concern has arisen surrounding artificial sweeteners cancer risk, specifically aspartame. The World Health Organization and its cancer research committee, the International Agency for Research on Cancer, reviewed the evidence.

Aspartame has been classified by the IARC as “possibly carcinogenic to humans”. This does not mean that it causes cancer at normal intake levels. It only identifies certain things that can pose a cancer risk.

At the same time, another WHO expert committee, the Joint FAO/WHO Expert Committee on Food Additives (JECFA), reaffirmed that aspartame is safe within the established acceptable daily intake (ADI). The ADI for aspartame is 40 mg per kilogram of body weight per day. To put this into perspective, for a 70kg adult, they would need to consume about 9-14 cans of coke zero in one day to exceed the recommended safe limit.

In conclusion, dietitians may recommend artificial sweeteners in certain circumstances or may strongly advice against sweeteners in other circumstances. It’s a perfect example of one size does not fit all when it comes to dietary advice.