The sale of coffee could be banned at all elementary, middle and high schools in South Korea as early as next year.

The Ministry of Food and Drug Safety announced on Saturday that it is pushing for a ban on the sale of all drinks labeled "highly caffeinated" at schools nationwide from next year, in a bid to reduce children and teens' exposure to caffeine.

The ministry said it is in talks with the National Assembly to pass a revised bill that has been submitted to parliament. Once the revision is passed, the government will also lay out detailed standards on the ban.

If the revision takes effect, all coffee drinks sold at school canteens and in vending machines for staff and teachers will also have to go.

Excessive consumption of caffeine is known to cause various side effects such as dizziness, sleep disorders, chest palpitations and jittery nerves.

The Food and Drug Safety Ministry currently advises daily caffeine intake of less than 400 milligrams for adults and below 300 for pregnant women. For kids and teens, the limit is under 2.5 milligrams a day per kilogram of weight.