Diet & nutrition
Artificial Sweeteners: What You Need To Know

What We’ll Cover:

  • What are artificial sweeteners?
  • Where are they used and why?
  • What does the science say?
  • Roczen’s approach to safely using sweeteners

Artificial sweeteners have been used for many years. They became more common during wartime food shortages in the 1940s, when sugar was limited. Since then, they have been widely researched and are now found in many foods and drinks.

Even with this research, questions about safety are common. Information online can be confusing or conflicting. This article explains what artificial sweeteners are, where they’re used, and how to include them safely based on current evidence

What Are Artificial Sweeteners?

Artificial sweeteners are substances that taste sweet. Some are man-made, while others are naturally found in plants. Common examples include:

  • Stevia
  • Aspartame
  • Xylitol
  • Sucralose

They make food and drinks taste sweet without adding sugar.

Where Are Artificial Sweeteners Used And Why?

Artificial sweeteners are now found in everyday products, including:

  • Drinks like diet fizzy drinks and flavoured water
  • Sugar-free sweets, yoghurts, and ‘light’ puddings
  • Protein powders and bars
  • Packaged sweeteners, such as Splenda, used at home

Because artificial sweeteners are much sweeter than sugar, only tiny amounts are needed. They usually have very few or no calories, which can help people reduce sugar or calorie intake, for example to support weight management.

What Does The Science Say?

Artificial sweeteners can be controversial. Some online articles or social media posts claim they are linked to cancer or other health risks. Headlines can leave out important details, so it’s always best to rely on scientific evidence and trusted sources. 

  • All sweeteners approved in the UK are tested for safety.
  • Legal limits exist on how much can be used in foods and drinks.
  • People with a rare condition called phenylketonuria (PKU) must avoid aspartame completely.

Some new studies have suggested possible risks from very large amounts of sweeteners, but these only suggest potential links - more research is needed. Cancer Research UK states there is no strong evidence that artificial sweeteners cause cancer.

Roczen’s Approach To Safely Using Sweeteners 

At Roczen, we base our advice on current scientific evidence. Normal amounts of artificial sweeteners are safe for most people. They can be helpful to reduce sugar and calorie intake.

However, sweeteners shouldn’t replace whole foods. A healthy diet is balanced, varied, and focuses on whole foods like fruits, vegetables, wholegrains and proteins. 

Some sweeteners can have a laxative effect if eaten in large amounts, so moderation is important. 

Here are practical tips to use them safely:

  • Use small amounts: A little goes a long way, since sweeteners are much sweeter than sugar.
  • Use sweeteners to reduce sugar, but focus on naturally sweet foods like fruit instead.
  • Pay attention to your body: If a sweetener causes bloating, discomfort, or loose stools, reduce the amount or try a different type.
  • Sweeteners can help make small changes, but overall diet quality matters more than any single ingredient.

By following these tips, artificial sweeteners can be included as part of a balanced diet, without replacing the healthy foods your body needs.

April 9, 2026
Page last reviewed:
April 9, 2026
Next review due:
Written by
Emelia Judge
Reviewed by
Catherine Hyatt
adattamento a cura del

The information on this page is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare professional for personalised medical guidance.

References

  1. European Food Safety Authority. Sweeteners [Internet]. Parma, Italy: EFSA; 2023 [cited 2026 Jan 8]. Available from: https://www.efsa.europa.eu/en/topics/topic/sweeteners
  2. NHS. Are sweeteners safe? [Internet]. London: NHS; 2025 [cited 2026 Jan 8]. Available from: https://www.nhs.uk/live-well/eat-well/food-types/are-sweeteners-safe/
  3. British Heart Foundation. Are artificial sweeteners safe? [Internet]. London: BHF; 2025 [cited 2026 Jan 8]. Available from: https://www.bhf.org.uk/informationsupport/heart-matters-magazine/news/behind-the-headlines/are-artificial-sweeteners-safe
  4. Diabetes UK. Sugar, sweeteners and diabetes [Internet]. London: Diabetes UK; 2025 [cited 2026 Jan 8]. Available from: https://www.diabetes.org.uk/living-with-diabetes/eating/carbohydrates-and-diabetes/sugar-sweeteners-and-diabetes
  5. Cancer Research UK. Do artificial sweeteners cause cancer? [Internet]. London: Cancer Research UK; 2024 [cited 2026 Jan 8]. Available from: https://www.cancerresearchuk.org/about-cancer/causes-of-cancer/cancer-myths-questions/do-artificial-sweeteners-cause-cancer

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