In 2003 the frozen-food company FRoSTA adopted its own Reinheitsgebot, purity law, a name that recalls the beer law. It allowed no additives at all. Sales collapsed, and the company stayed with the rule.
Its chief executive Felix Ahlers explains the rule by the way the food is made. Wir wollen keine Zutaten ins Essen mischen, die man zu Hause nie verwenden würde. We do not want to mix any ingredients into the food that one would never use at home.