Treacle

Black treacle has a distinctively strong, slightly bitter flavour, and a richer colour than golden syrup.

Historically, the Middle English term treacle was used by herbalists and apothecaries to describe a medicine (also called theriac or theriaca), composed of many ingredients, that was used as an antidote for poisons, snakebites, and various other ailments.

[3] Triacle comes from the Old French triacle, in turn from (unattested and reconstructed) Vulgar Latin *triacula, which comes from Latin theriaca,[5] the latinisation of the Greek θηριακή (thēriakē), the feminine of θηριακός (thēriakos), 'concerning venomous beasts',[6] which comes from θηρίον (thērion), 'wild animal, beast'.

[9] Black treacle naturally contains relatively high levels of sulphite (>100ppm, expressed in sulphur dioxide equivalent).

As such, that the United States Food and Drug Administration requires that levels over 10ppm, i.e. >10mg/kg, be declared on the ingredients label.