Parental supply of alcohol as a predictor of adolescent alcohol consumption patterns: A prospective cohort.

•No evidence for any protective effect of parental supply on adolescent drinking.•Young adolescents supplied by parents later reported greater alcohol consumption.•Young adolescents supplied by parents later reported more frequent drinking.•Other supply had a stronger association with drinking than parental supply.•As the sample approached adulthood, drinking increased regardless of parental supply.