A long-term study of more than 11,000 children and teens has linked recreational cannabis use to slightly slower development of memory, attention, and thinking skills. This is the largest analysis of its kind conducted in the US. It’s based on data from the Adolescent Brain Cognitive Development study, which tracked the brain health and function of 11,036 young people from age 9 or 10 until they reached age 16 or 17.

Original article