When breastfeeding mothers in a recent study used cannabis, its psychoactive component THC showed up in the milk they produced. The research also found that, unlike alcohol, when THC was detected in milk there was no consistent time when its concentration peaked and started to decline. Importantly, the researchers discovered that the amount of THC they detected in milk was low — they estimated that infants received an average of 0.07 mg of THC per day. For comparison, a common low-dose edible contains 2 mg of THC. The research team stressed that it is unknown whether this amount has any impact on the infant. 

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