Here is the citation of this study published in 2021.
Wymore EM, Palmer C, Wang GS, et al. Persistence of Δ-9-tetrahydrocannabinol in human breast milk. JAMA Pediatr. 2021;175:632–4.
Here is the PubMed link. This is an open access article.
https://pubmed.ncbi.nlm.nih.gov/33683306/
Here is a brief synopsis of the study.
The research team hailed from Colorado …