I bought some gluconolactone & sodium benzoate preservative(Gluconolactone ~70%, Sodium benzoate ~22%, Calcium gluconate ~1%), and in the information leaflet they provided, it says that this preservative is:
"not for use in products which contain food colours (due to undesirable chemical reaction which may convert the sodium benzoate to its acidic state (benzoic acid)"
- which is odd since I thought that was how the preservative worked and also food colours from the supermarket use sodium benzoate. Though they didn't specify what kind of food colours.
So I'm confused, what does this mean?