[swingline-747]

Artificial sweetener anyone? How about some hair dye? (still allowed today in the US but not in Canada)

https://en.wikipedia.org/wiki/Lead(II)_acetate

Sodium Pyrophosphate is also a "fun," somewhat toxic additive. https://en.wikipedia.org/wiki/Tetrasodium_pyrophosphate

[ikeyany]

Lead acetate is banned in the US (except for use in hair dye, which the FDA proved is safe).