Parents, take note! Allowing your children to occasionally sip and taste alcohol may increase their risk for drinking-related problems in late adolescence, a study has found.

The findings contradict the common belief that letting kids sip and taste alcoholic drinks is harmless, and might even help to promote responsible drinking later in life.

Sipping alcohol with adult supervision in childhood, so often viewed as innocuous, can be harmful when kids get older and age into peak periods of heavy drinking.

"Early sipping and tasting are predicting increased drinking behaviour in young adulthood," said Craig Colder, a professor at University at Buffalo in the US.

"Sipping and tasting the alcohol in childhood with adult permission is associated with more frequent drinking and an additional drink per drinking episode," Colder said.

"It's not only how often they're drinking and how much they're drinking in late adolescence, but the negative consequences related to drinking increase as well, like being hungover, getting into trouble, arguing and fighting," he said.

Roughly a third of all children before the age of 12 will taste alcohol with their parent's permission.

Though common in practice, that sipping and tasting still happens infrequently, perhaps four or five times a year.

"If I say a kid sips or tastes an alcohol drink a couple of times a year, few people would bat an eyelash," said Colder.

"But the data strongly suggest that such infrequent tasting in early childhood is not a benign behaviour," he said.

The findings, published in the journal Addictive Behaviors, support educational interventions already developed by other researchers to reduce sipping and tasting among children.

Early sipping represents what is often a child's first direct experience with drinking, yet little research has examined the long-term impact of this behaviour, in part because most studies do not measure early sipping and tasting alcohol with parental permission.

"Alcohol use without parental permission is typically initiated around age 13 or 14," said Colder.

"The early sipping measured in this study was prior to age 13 before most kids initiate alcohol use without parental permission," he said.

Researchers annually interviewed two demographically representative community samples, each consisting of approximately 380 families, for seven years.

The data clearly show that these were average kids who were not growing up in problem families, yet these kids who engaged in early sipping and tasting were embedded in a social context that supports drinking.

Colder said there is no evidence that the sipping and tasting that occurred within the two samples were in any way related to deficient parenting and or poor family functioning. It was limited to what he calls alcohol-specific socialization.

"These are not alcoholic families, but families that have more laissez-faire attitudes about underage drinking. The kids are also interacting with peers that have pro-drinking attitudes. We know that" he said.

"When we statistically control for these contexts, this early sipping and tasting behaviour is still predictive of these long-term outcomes," he added.