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29 April 2015, 06:16 | Updated: 29 April 2015, 06:25
Heart's been told by a public health expert in Birmingham that more education's needed to stop young people thinking that taking laughing gas isn't dangerous - because it's classed as a legal high.
It's after warnings that more young people are taking nitrous oxdie through balloons.
West Brom footballer Saido Berahino and Villa's Jack Grealish have been pictured doing it - leading to concerns it'll encourage more to use it.
Ricky Bhandal's from Birmingham City Council's Public Health team.
He said: "It's the misuse of the drug that's actually having a knock on effect.
"There's not enough long term research in terms of death and how they're being recorded at the same time."