There's growing concerns younger teens are being targeted by vape marketing.

An Auckland University study shows people aged 14-to-17 are more likely to see vaping ads than 18-to-20-year olds.

Half of the 3500 in the study had been exposed through social media.

Marketing professor, Bodo Lang, says more needs to be done to control messaging around vape products.

"It's really been shown to be a very powerful entry drug for young people, particularly non-smokers to get them into vaping- and then potentially get into something else."

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