These things usually vary by region or country. For example, in Canada, they only very recently (or will be soon, I can't recall for sure) lifted restrictions

These things usually vary by region or country. For example, in Canada, they only very recently (or will be soon, I can't recall for sure) lifted restrictions on caffeine in non-colas. Previously, things like Mountain Dew, Sprite, 7-up, etc., could not contain caffeine.