The American consumer group leading a smear campaign against Quorn is claiming its first victory over the meat substitute brand.
It has persuaded advertising watchdogs to force Quorn producer Marlow Foods to either clarify the label mushroom protein' in future print advertising or drop it completely.
The Advertising Standards Authority agreed the term was "misleading" and has effectively banned the company from using the tag in any future advertising unless equal prominence is given to an explanation of the product's specification.
Marlow Foods said it would abide by the ruling but refutes all allegations that Quorn is unsafe.
However, the pressure group's attempts to persuade the Food Standards Agency that Quorn is unsafe for human consumption remain thwarted.
The Agency this week rejected claims from the Washington-based Centre for Science in the Public Interest that a growing number of people are falling ill after eating the brand.
The FSA's director of food safety policy, Jon Bell, told the group: "Any protein-containing food has the potential to cause an allergic reaction."

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