Is Diet Soda Safe During Pregnancy?

Is diet soda safe during pregnancy?

FDA-approved sweeteners like aspartame and sucralose are considered safe in moderation, but watch the caffeine in colas and limit overall intake. In short, diet soda is usually fine in moderation during pregnancy when you follow the guidance below.

Why this is the guidance

During pregnancy your immune system is naturally suppressed and your body is sharing everything with your baby, so foods are judged on two things: the chance of foodborne illness (like listeria or salmonella) and whether anything in them — caffeine, mercury, alcohol, certain additives — can reach your baby.

How much diet soda is okay

The key with diet soda is moderation, not avoidance. Keep portions modest and occasional rather than daily, choose pasteurized and thoroughly cooked versions where that applies, and pay attention to how it's prepared and stored. If you're ever unsure about a specific situation, your provider can give you a clear yes or no.

What about breastfeeding?

Pregnancy and breastfeeding aren't the same — some things that are limited while you're pregnant are perfectly fine once you're nursing, and occasionally the reverse is true. If you're past delivery and wondering about diet soda while breastfeeding, check with your provider, since the answer can be different from the pregnancy guidance above.

The bottom line

Diet Soda: usually fine in moderation in pregnancy. Keep it modest and occasional, and ask your provider about your specific situation. This page is general education, not medical advice — your provider knows your history and is the final word for your pregnancy.