Can I Drink Coca-Cola When Pregnant?
Can you drink Coca-Cola when pregnant? The short answer is yes — Coca-Cola is safe to drink during pregnancy, but you should keep an eye on how much you have because it contains caffeine. A single standard can of Coca-Cola contains roughly 32–34mg of caffeine, which is well below the NHS recommended limit of 200mg of caffeine per day in pregnancy. However, caffeine adds up across everything you eat and drink, so it is worth being mindful of your total intake.
Is Coca-Cola Safe in Pregnancy?
Coca-Cola and other cola drinks are not on the NHS list of foods and drinks to avoid during pregnancy. The main concern with cola drinks is their caffeine content rather than any risk of harmful bacteria, parasites, or unsafe nutrients.Caffeine crosses the placenta. Because your baby cannot metabolise caffeine as efficiently as you can, high caffeine intake during pregnancy has been associated with slower fetal growth. This is why the NHS and most UK maternity guidelines recommend keeping total daily caffeine intake below 200mg throughout pregnancy — not just in the first trimester.
A standard 330ml can of regular Coca-Cola contains around 32–34mg of caffeine. This means that in isolation, one can of Coke is well within the daily limit. The issue arises when you are also drinking tea, coffee, energy drinks, or eating chocolate — all of which add to your daily caffeine total.
Diet Coke and Coca-Cola Zero contain slightly more caffeine than regular Coke (around 42mg per can for Diet Coke) and also contain artificial sweeteners. The NHS considers artificial sweeteners used in approved food and drinks safe during pregnancy, though as with anything, moderate consumption is sensible.
NHS Guidance on Caffeine in Pregnancy
The NHS advises that pregnant women should limit caffeine intake to no more than 200mg per day. This includes caffeine from all sources:- A mug of instant coffee: roughly 100mg
- A mug of filter coffee: roughly 140mg
- A mug of tea: roughly 75mg
- A can of cola (regular): roughly 32–40mg
- A 50g bar of dark chocolate: roughly 25mg
If you drink one can of Coca-Cola, you have used roughly a sixth of your daily caffeine allowance — leaving plenty of room for a cup of tea or a small coffee if you want one. If you are drinking several cans per day, or combining cola with other caffeine sources, it is worth checking you are staying within the 200mg limit.
The NHS also notes that you do not need to cut out caffeine completely — the guidance is to limit, not eliminate.
Practical Tips for Cola Drinks in Pregnancy
- **Count all your caffeine sources together.** Use the rough figures above to estimate your daily total and stay under 200mg. - **Choose caffeine-free cola if you drink a lot.** Caffeine-free versions of Coca-Cola are widely available and contain essentially no caffeine, so they are a straightforward swap if you are worried about your intake. - **Watch your sugar intake.** Regular cola is high in sugar. While there is no specific NHS limit on sugar for pregnant women beyond general healthy eating advice, high sugar intake is associated with excess weight gain and dental issues. Drinking cola in moderation rather than as your main fluid intake is sensible. - **Stay hydrated with water.** Cola is not a substitute for water. Aim for around six to eight glasses of fluid per day, with water being the best choice. - **Avoid energy drinks.** Energy drinks often contain much higher levels of caffeine than cola — sometimes 80mg or more per can — and may contain other stimulants. Energy drinks are not recommended during pregnancy.What About Fizzy Drinks and Heartburn?
Carbonated drinks including cola can worsen heartburn and acid reflux, which are already common in pregnancy, particularly in the second and third trimesters. If you are already struggling with indigestion, cutting back on fizzy drinks may help ease symptoms alongside other dietary adjustments. Speak to your midwife or GP if heartburn is affecting your daily life — they can advise on antacids that are safe during pregnancy.Frequently Asked Questions
### How much Coca-Cola can I drink when pregnant?There is no fixed number of cans, as the key limit is total daily caffeine intake below 200mg. A standard can of Coca-Cola contains around 32–34mg of caffeine, so in caffeine terms alone, several cans would still fall within the limit. In practice, keeping cola consumption moderate — and accounting for caffeine from tea, coffee, and other sources — is the sensible approach.
Is Diet Coke or Coke Zero safe in pregnancy?
Yes, diet cola drinks are generally considered safe in pregnancy. They contain slightly more caffeine than regular Coke (around 42mg per can for Diet Coke), and the artificial sweeteners used in them are approved for use in pregnancy. Moderate consumption is fine. If you are concerned about sweeteners, choosing caffeine-free versions is a simple alternative.
Can caffeine from Coca-Cola cause a miscarriage?
High caffeine intake during pregnancy has been associated with a range of adverse outcomes in large population studies, which is why the NHS recommends keeping under 200mg per day. However, a single can of Coca-Cola at around 32mg of caffeine is a small fraction of that limit and is not considered a meaningful risk on its own.
Speak to your midwife or GP for personal advice about your diet and caffeine intake during pregnancy.
Last reviewed: June 2026
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