The main addictive ingredients are fat, salt and sugar which is very addicting to most people no matter what the fat, salt and sugar are in.
The other ingredients that Pringles are made from are a closely guarded secret and if you work there and share those secret ingredients not only would you get fired but you'd also get sued.
You usually have to sign and agreement with the Pringles company saying that you will never release the ingredients to make Pringles chips.
Pringles does not allow even cameras or phones to be brought into their facilities.
They make Pringles addicting so that you'll eat more and buy more.
Pringles are not the healthiest chips but they are not bad in moderation.