Irn Bru – I has a skepticism

I don’t buy the Irb Bru story:

Mr Barr is one of only two people in the world who knows the secret recipe for the best-selling Irn Bru drink and the two never travel on the same plane.

Once a month the essences for the drink are personally mixed by Robin Barr in a sealed room at the company’s headquarters in Cumbernauld.

[…] Only one other unnamed person shares the secret but the formula has been written down and is stored in a bank vault somewhere in Scotland.

This is all PR fluff, right? Like the magical secret Coke recipe, presumably. Surely it’s not beyond the wit of chemists to figure out ingredients?