What is the most sour candy in the world?

The title of the "most sour candy in the world" is generally bestowed upon the Toxic Waste Candy.

This candy is known for its intense sour flavor, which comes from a coating of malic acid. It's not just one sour layer; it features a double-action sour experience.

First, the initial outer layer is extremely sour. Once that subsides, you reach a slightly sweeter core, only to find another sour layer within. This multi-layered sour attack is what sets it apart.

The sourness level is often described as extreme, with many people finding it challenging to keep the candy in their mouth for an extended period. There is also a Hazardously Sour level that some of the candies claim.

Toxic Waste Candy is available in different flavors. Malic acid is a main ingredient of the candy. Hazardously Sour candies are claimed to be more sour.