Can You Have Aspartame (Sweeteners) When Pregnant?
Written by Jordan Morley · Reviewed against NHS foods-to-avoid guidance · Last updated 28 October 2026
Yes — sweeteners approved in the UK, including aspartame, are considered safe during pregnancy by the NHS.
Why is aspartame (sweeteners) safe in pregnancy?
All sweeteners permitted in UK food — aspartame, sucralose, stevia, saccharin and others — have been assessed for safety, and the NHS confirms they're fine during pregnancy in normal dietary amounts. (The exception is anyone with PKU, who must avoid aspartame at all times.)
You can also check the calorie content of aspartame (sweeteners) alongside its safety information. Also check medication safety during pregnancy if you're managing any conditions.
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Check Price →Common questions
Can I eat aspartame (sweeteners) in the first trimester?
Yes — aspartame (sweeteners) is safe at every stage of pregnancy, including the first trimester.
Is a small amount of aspartame (sweeteners) OK during pregnancy?
No limit applies. Aspartame (Sweeteners) is not on the NHS list of foods to avoid or limit in pregnancy.
I accidentally ate aspartame (sweeteners) while pregnant — what should I do?
No action needed. Aspartame (Sweeteners) is safe during pregnancy.
Is cooked aspartame (sweeteners) safe in pregnancy?
Yes. Aspartame (Sweeteners) is safe in pregnancy. Only the usual rules apply: cook it properly where it needs cooking, keep chilled food chilled, and eat it before the use-by date.
Related answers
Primary source: NHS foods-to-avoid guidance.
General information only, not medical advice: see the medical disclaimer. Feeling unwell after eating something? Contact NHS 111 or your GP.