The UK government is planning a new law in England to stop anyone under 16 from buying energy drinks from shops, cafes, vending machines and online.
Up to a third of children in the UK are thought to drink one or more a week, despite many supermarkets having introduced a voluntary ban.
Some popular drinks contain more caffeine than two cups of coffee.
A 12-week consultation will now gather evidence from health and education experts as well as the public, retailers and manufacturers.
No official date has been set for the ban, but it will come in “a lot sooner” than the end of this Parliament, according to Wes Streeting, the UK’s health and social care secretary.
Northern Ireland, Scotland and Wales are also considering a ban.