Caffeine in Pregnancy: What 200 mg Actually Looks Like

The number is 200 mg a day. Easy to say, much harder to know how many cups max you're recommended to have. That is why so many women either stop caffeine completely out of caution or lose track of it altogether. This guide turns the number into mugs, cans and bars, so you know your exact limit.

The limit, and what kind of limit it is

Both NHS and ACOG guidance put the figure at 200 mg of caffeine a day during pregnancy. WHO uses a higher figure of 300 mg, and where guidance differs we follow the more cautious number.

The important word here is ceiling. This is not a daily allowance to use up, and there is no benefit to getting close to it.

Equally, this is not a reason to feel guilty about a morning cup. 200 mg is a real quantity of caffeine, and staying under it is easy once you know the following.

What 200 mg looks like

These NHS per-drink figures are the ones worth remembering:

• Mug of instant coffee: around 100 mg
• Mug of tea: around 75 mg
• Can of cola: 40 mg
• 250 ml energy drink: 80 mg
• 50 g bar of dark chocolate: under 25 mg
• 50 g bar of milk chocolate: under 10 mg

So a day with two instant coffees is right on the line. A day with tea in the morning, a tea in the afternoon and a square of dark chocolate is still comfortably under it, at roughly 160 mg.

The filter coffee problem

Filter coffee and coffee-shop drinks generally run higher in caffeine than instant, sometimes much higher.

A large to-go coffee can get close to the whole daily figure on its own, depending on the shop, the size and how many shots went into it. The variation from one cafe to the next is wide enough that we can't give any specific recommendations.

Let's put it this way, to be safe: if you buy your coffee out, treat one as most of your day's allowance, not a half of it. If you make it at home, you probably have room for one more.

Where caffeine hides

Coffee and tea are obvious. These are the ones people miss:

• Green tea and white tea. Both contain caffeine, at levels broadly comparable to black tea depending on strength and steeping.
• Matcha. You are consuming the whole leaf, so it tends to run higher than brewed green tea.
• Cola and other soft drinks. Not only the dark ones.
• Chocolate, in small amounts, dark more than milk.
• Some cold and flu remedies and painkillers. Read the label and ask a pharmacist about the safety of any medicine in pregnancy.

Herbal teas are generally caffeine-free, but they come with their own note: no more than about four cups a day, and skip licorice root tea entirely. Rooibos and peppermint are common caffeine-free choices.

Decaf, and whether it counts

Decaffeinated coffee and tea contain small residual amounts of caffeine rather than none, usually a few milligrams per cup. At that level, it's not worth tracking, and decaf is a sensible way to keep the ritual without the arithmetic.

Cutting down without misery

If you are used to considerably more than 200 mg, dropping to zero overnight won't be easy and you might even experience a headache. Try this instead:

• Halve rather than stop. Move from filter to instant, or from a large to a small.
• Swap the second cup, not the first. The morning one is usually the one that matters most to many.
• Go half-caf. Mixing regular and decaf grounds is an easy way to taper.

One more important thing to note: keep tea and coffee away from iron-rich meals. The tannins reduce how much iron your body absorbs from plant sources, which matters most in the third trimester when iron demand peaks. An hour before or after a meal is the usual suggestion.

After the birth

The ceiling stays at 200 mg a day while breastfeeding, according to NHS guidance, with some US guidance allowing up to around 300 mg. Caffeine does pass into breast milk in small amounts, and newborns clear it far more slowly than adults, so don't go over the limit.

A few more tips: have the coffee just after a feed rather than just before, so there is the longest possible gap. And if your baby seems unusually wakeful and you are drinking a lot, try lowering the amount, though sleep at that stage has many more likely explanations than your coffee.

Where to go next

• Foods to avoid in pregnancy, for everything else on the list.
• What to eat in the first trimester, if coffee has stopped appealing entirely.
• Iron-rich recipes, for the tea-and-iron timing point above.

Sources & further reading

• NHS: Foods to avoid in pregnancy
• ACOG: How much coffee can I drink while I'm pregnant?
• NHS: Breastfeeding and diet
• CDC: Maternal diet and breastfeeding