What it is
Vegetable oil weighted down with bromine so citrus flavor oils stay suspended in soda — the cloud in old citrus sodas.
Why your biology objects
The brominated fat bioaccumulates, depositing bromine in your tissues, and animal studies showed thyroid toxicity at dietary doses. The FDA revoked its approval in 2024; it was already banned in the EU, UK, Japan and India. An industrial novelty that proved its own case against itself.