What it is
A pine-rosin compound that weights flavor oils so citrus soda stays evenly cloudy — the leading replacement for banned brominated vegetable oil.
Why your biology objects
An industrially made wood-rosin ester whose only job is density-matching so flavor oils don't float — pure beverage-appearance engineering with no whole-food analog. Benign by the safety numbers, but it exists to make cloudy soda look right.