Coffee, chai and caffeine during pregnancy

The limit, and why

Most guidance sets a limit of 200 milligrams of caffeine a day in pregnancy. Higher intakes have been associated with low birth weight and, at high levels, with miscarriage.

Caffeine crosses the placenta, and a baby cannot metabolise it. It is also cleared more slowly by the mother as pregnancy progresses — by the third trimester it can take several times longer to clear than before pregnancy.

The evidence on the exact threshold is debated and the practical advice is stable: keep it under 200mg, and lower is not harmful.

There is no need to stop entirely, and there is no evidence that a moderate intake causes harm.

Caffeine also reduces iron absorption, which matters a great deal in India where anaemia in pregnancy is extremely common. Keep tea and coffee away from meals and away from iron tablets — at least an hour either side.

What is in an Indian day

A cup of instant coffee: roughly 60-80mg. A mug is more.

South Indian filter coffee: roughly 90-120mg depending on strength, and often stronger at home than in a café.

A cup of masala chai made with tea leaves: roughly 30-50mg. Weaker than coffee and easy to underestimate because of how many are drunk.

Green tea: roughly 25-40mg a cup. Not caffeine-free.

A 330ml cola: roughly 30-40mg. Energy drinks: 80mg and up per can, and best avoided entirely in pregnancy.

Dark chocolate: roughly 20-25mg per 50g bar. Milk chocolate less.

So a realistic day: two filter coffees is already at or over the limit. Four chais is around the limit. One coffee plus two chais is roughly at it.

Also count: some cold coffee preparations, chocolate drinks, and certain painkillers and cold remedies which contain caffeine — check the label, and check any medicine with your doctor.

Cutting down

Reduce gradually rather than stopping abruptly, to avoid headaches — which are unpleasant in pregnancy and easily confused with something that needs assessment.

Make the tea weaker rather than dropping the ritual, which is usually what people actually miss.

Switch some cups to caffeine-free alternatives: milk, buttermilk, coconut water, lemon water, or herbal infusions — checking that any herbal tea is one your doctor is happy with, since several are not recommended in pregnancy.

Move the remaining caffeine to the morning, which helps late-pregnancy insomnia.

And keep it away from meals and iron tablets, which is the change that matters most in the Indian context.

When to see a doctor

Ask your obstetrician about your own intake if you drink a lot of coffee or chai, and ask about your haemoglobin — anaemia is common and caffeine with meals makes it worse.

See a doctor for: palpitations, a racing heart, tremor, or severe insomnia, which may relate to intake or may need investigation for other causes such as thyroid problems.

Same-day care for a severe or persistent headache, particularly with visual changes or swelling, which needs blood pressure checked rather than being attributed to caffeine withdrawal.

And check with your doctor before taking any medicine, supplement or herbal preparation, several of which contain caffeine or are not advised in pregnancy.

This article is general information, not medical advice, and has not been reviewed by a clinician.

This article is general information, not medical advice, and is no substitute for personal medical advice. For any decision about your or your child's health, please consult your doctor.

Frequently asked questions

Q: Is one coffee a day fine? — Generally yes, within the 200mg limit. A strong filter coffee may be most of that limit on its own.

Q: Is chai safer than coffee? — Lower per cup, and easy to exceed the limit because of the number of cups.

Q: Is green tea safe in pregnancy? — In moderation. It contains caffeine, and very high intakes may interfere with folate absorption. Keep it modest and away from meals.

Q: What about decaf? — Fine. It contains a small residual amount, well within any limit.