Women who consume or use cannabis while breastfeeding are passing delta-9-tetrahydrocannabinol (THC), the psychoactive component in the drug, on to their nursing child, according to a new study.
“Breastfeeding parents need to be aware that if they use cannabis, their infants are likely consuming cannabinoids via the milk they produce, and we do not know whether this has any effect on the developing infant,” Courtney Meehan, a biological anthropologist at Washington State University and one of the authors of the study, said in a press release.





