It's definitely no longer Prime day in Canada ... officials up north said this week they're recalling Logan Paul and KSI's popular energy drink -- due to its high caffeine content.

Health Canada announced the decision Wednesday ... saying at 200 milligrams of caffeine per can, Prime Energy needs to be pulled from store shelves.

Officials said the caffeine in each container -- which is equal to roughly two full cans of Red Bull -- is just too high ... coming in at 20 milligrams over the country's recommended limit of 180 per serving.

The move comes just a couple days after United States senator Chuck Schumer questioned whether the social media influencers' beverage should be sold in American stores as well.

The democrat argued that it posed a "serious health concern" for kids ... and he urged the Food and Drug Administration to investigate it all.

For their part, Paul and KSI have fired back ... noting that Prime Energy is different than the Prime Hydration beverage that they initially launched back in 2022.

The hydration one, they and the company reiterated, is for everyone ... while the energy version -- which dropped earlier this year -- is "not recommended" for anyone under 18 years old.

Paul recently created a sarcastic social media video where he attempted to demonstrate the difference between the drinks and water.

"As a brand," Prime officials added in a statement earlier this week, "our top priority is consumer safety, so we welcome discussions with the FDA or any other organization regarding suggested industry changes they feel are necessary in order to protect consumers."

All versions of the Prime drinks have become wildly popular since their debuts ... as the social media stars have aggressively advertised it to their legions of fans with a ton of success.