Per Medications and Mother's Milk (Hale 2017, p. 139 - 140)
caffeine is in Lactation Risk Category L2 (safer); milk levels are quite low (0.06 - 1.5 % of maternal dose) and usually peak 1 - 2 hours
after ingestion.
Conclusion «
Caffeine might not attenuate the ergogenic benefits of creatine, if the ingestion of caffeine occurred after the creatine loading phase», the Taiwanese su
Caffeine might not attenuate the ergogenic benefits of creatine, if the
ingestion of
caffeine occurred after the creatine loading phase», the Taiwanese su
caffeine occurred
after the creatine loading phase», the Taiwanese summarise.