★★★Well replicated — this finding’s sources average out to meta-analyses, systematic reviews or high-powered trials.
The advice in pregnancy is half the usual: 200 mg of caffeine a day
European regulators advise under 200 mg of caffeine a day during pregnancy, against 400 mg for other healthy adults, and no more than 200 mg in a single serving.
What the study found
In pregnancy the advised ceiling halves, to 200mg of caffeine
Pregnancy halves the number. European regulators advise staying under 200mg of caffeine a day while pregnant, against 400mg for other healthy adults, and that same 200mg is the most they suggest for any single serving.
The caveat · No trial in pregnant women set it
This is a precautionary ceiling drawn from a broad safety review, not a figure any trial in pregnant women produced. It describes a population rather than any particular pregnancy.