The American College of Obstetrics and Gynecologists and the American Academy of Pediatrics, advise nursing moms to abstain from using marijuana.
For ethical reasons, very little research has been done on the effects of weed on breastfed babies. But we do know that babies are much more vulnerable to chemicals and toxins than adults. And babies are exposed through breast milk to the active chemicals in weed, including THC (tetrahydrocannabinol), the one that gets you high.
We know this because traces of THC are found in the urine of breastfed babies whose mothers use marijuana. Researchers think that babies exposed to marijuana through breast milk may become sedated and unable to suck well. Experts are also concerned about the long-term effects on the development of children exposed to these chemicals during breastfeeding.
The same thing applies whether you smoke weed or consume marijuana edibles or oil. In fact, many edibles contain higher amounts of THC than what you smoke. And marijuana is not less risky than other drugs (such as antidepressants) because it is “natural.”
Weed may also be contaminated with other drugs or herbicides that could put your baby at even greater risk. Even marijuana from legal dispensaries labeled as approved or certified isn’t necessarily uncontaminated because dispensaries aren’t tightly regulated.