Can You Eat Aspartame (Sweeteners) When Pregnant?
Reviewed against NHS foods-to-avoid guidance · Updated September 2026
Nutritional data sourced from USDA FoodData Central and Public Health England. Always consult a registered dietitian for personal dietary advice.
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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Pregnancy essentials
Pregnancy multivitamin
The NHS advises 400µg of folic acid daily — easiest as one daily tablet.
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More pregnancy essentials
Baby-safe food thermometer
Useful for pregnancy cooking checks and later for baby food.
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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?
There is no safety limit on aspartame (sweeteners) during pregnancy — enjoy it as part of a balanced diet.
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 during pregnancy whether cooked or raw (where it's normally eaten raw).
Related answers
Primary source: NHS foods-to-avoid guidance.
The information on 247foodcheck.com is compiled from official public guidance (NHS, Food Standards Agency, USDA/FDA FoodKeeper) and is provided for general information only. It is not medical advice and does not replace guidance from your midwife, GP, health visitor or other qualified professional. When in doubt, throw it out — and if you feel unwell after eating something, contact NHS 111 or your doctor.