The small black pellets were particularly marketed as an expectorant lozenge for singers, using the slogan "for clarity of voice".
[1][2] After several changes of ownership, Ernest Jackson became a subsidiary of Kraft Foods in 2011, and later of Mondelez International.
Small quantities of other flavourings such as menthol, eucalyptus and peppermint are added to help the pellets act as a breath mint.
They afford protection to the Voice, Throat, and Chest, against ill-effects of fog, cold and damp.
[4] Vigroids/Mighty Imps were listed on the Ernest Jackson Web site until October 2014, but no longer appeared from January 2015.