Ascorbic acid (vit. C synthetic)
phosphoric acid
May contain traces of histamine or be a source of contamination.
Unsuitable
This food is often poorly tolerated with histamine intolerance.
Phosphoric acid is an additive that is not itself a source of histamine. However, in the food industry, contamination can occur during production. Some sources state caution.
Safer alternatives
Suitable
Folic acid
L-ascorbic acid (E300)