Can you drink oolong tea while pregnant?
In moderationYes, oolong tea is fine within the 200 mg daily caffeine limit. A cup brews around 40 to 60 mg of caffeine, so up to three cups a day keeps you comfortably under the limit when tea is your main source.
Why
The only pregnancy concern with oolong is caffeine, since the leaves are the same plant as black and green tea. ACOG advises keeping total caffeine under 200 mg a day, and the NHS sets the same 200 mg ceiling, linking higher intakes to low birth weight and an increased risk of miscarriage. Oolong sits between green and black tea in strength, roughly 40 to 60 mg per 8 oz cup depending on how long you steep it, so three cups lands around 120 to 180 mg. The number that matters is your daily total, so count any coffee, cola, matcha, energy drinks and chocolate in the same budget, and remember that a longer steep pulls out more caffeine than a quick one.
Safer alternatives
- Decaf oolong from Rishi Tea or Numi, which keeps the roasted flavor
- Roasted barley tea (mugicha) from Ito En, naturally caffeine free
- Rooibos, which brews dark and malty with no caffeine
- Hojicha, a roasted green tea that is much lower in caffeine than matcha
Sources
- ACOG https://www.acog.org/womens-health/experts-and-stories/ask-acog/how-much-coffee-can-i-drink-while-pregnant
- NHS https://www.nhs.uk/pregnancy/keeping-well/foods-to-avoid/
Every verdict follows our sourcing methodology: official health guidelines only, most cautious position when they differ.
Last reviewed by the pregAI editorial team.
Frequently asked questions
How much caffeine is in oolong compared to coffee?
An 8 oz cup of oolong has roughly 40 to 60 mg of caffeine, while the same size brewed coffee has around 95 to 165 mg. That means you can drink two or three cups of oolong for the caffeine cost of one coffee. Steep time matters: a three minute brew is noticeably lighter than a five minute one.
Can I drink oolong milk tea or bubble tea while pregnant?
Yes, in the same 200 mg budget, but shop versions are often brewed strong and served in 16 or 24 oz cups, so one large bubble tea can carry 100 mg or more. Ask for half strength tea or a smaller size if you have already had coffee that day. The tapioca pearls and milk themselves are not a safety issue, just sugar.
Is oolong safe in the first trimester?
Yes, the 200 mg limit is the same in every trimester, so there is no extra restriction early on. If first trimester nausea makes tea unappealing, there is no requirement to drink it. Many people find a lighter, shorter steep easier on a queasy stomach.
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