Headlines about sweeteners can leave you wondering what to put in your shopping basket. Start by separating the ingredient's purpose, the safety assessment and your own dietary needs.
What is aspartame?
Aspartame is an intense sweetener used in some low-energy and sugar-free foods and drinks. Food Standards Australia New Zealand has assessed its safety for use as a sweetener. FSANZ — Aspartame.
If you are comparing products, read the ingredients rather than relying only on the front label. Note the serving size and how the food or drink fits into your usual day.
Why do the headlines sound different?
In 2023, IARC classified aspartame as possibly carcinogenic based on limited evidence. At the same time, JECFA reviewed exposure and retained its existing acceptable daily intake. WHO — Aspartame hazard and risk assessments.
These assessments answer different questions. A hazard classification identifies the potential to cause harm; it does not state the cancer risk at a particular level of exposure. The WHO report also identifies uncertainty and the need for further research. WHO — Aspartame hazard and risk assessments.
That distinction is more useful than treating an ingredient as either a health food or something to fear in every amount.
Do individual needs matter?
People with phenylketonuria, or PKU, need to avoid aspartame because it contains phenylalanine. Follow the advice of your specialist care team. FDA — Aspartame and other sweeteners in food.
If a label raises questions for you, take it to your dietitian or GP. Ask which part matters for your situation before changing a wider eating plan.
You might choose plain water simply because you enjoy it. Our soft drinks article offers more everyday label-reading questions, without requiring a particular sweetener choice.
Sources
Read 15 October 2026. Sources support the adjacent general information; clinic sources verify the current appointment menu.
- FSANZ — Aspartame — Australian and New Zealand food regulator guidance; accessed 2026-10-15.
- WHO — Aspartame hazard and risk assessments — international expert-assessment summary; accessed 2026-10-15.
- FDA — Aspartame and other sweeteners in food — US food regulator guidance; accessed 2026-10-15.
