Caffeine and Lactation
The estimated dose that makes it to Baby through your milk is 0.06% and 1.5%. That is usually considered insignificant, but infants metabolize caffeine more slowly. The dose that you consume is cut in half in 3-7 hours, but it can be days for a baby younger than a week old.
Look for these reported side effects: Agitation, Irritability, Poor Sleeping Patterns. That would indicate that Baby is sensitive to the small dose. ** the dose in the case reports is massive. I haven't seen any reports of these symptoms when maternal dose is <300mg/day
It's a different risk to benefit calculation, but note-worthy that caffeine is regularly prescribed to medically fragile infants. That dose is 5mg/kg. Keeping your consumption under 300mg/day makes the dose transferred to Baby a fraction of 1%.
What some Case Reports Show:
Overdose occurred at 36 to 136 mg/kg
Caffeine transfer in breastmilk peaks at 2 hours
No adverse effects found from moderate maternal caffeine consumption found on meta analysis
***See the references for more information on energy drinks and other sources of caffeine.
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