Benzoic acidPreservative; benzene-formation potential with ascorbic acid; intolerance reactions.
Propionic acidPropionate preservatives have been associated in limited studies with behavioural/irritability effects in children and with migraine in sensitive individuals; evidence is weak.
Phosphoric acidAcidulant (colas); high total phosphate intake linked to bone-mineral and renal concerns in some studies.
Carboxymethyl cellulose (CMC)Synthetic emulsifier linked in animal and in-vitro studies to gut-microbiome disruption and intestinal inflammation; human evidence is emerging.
Per-ingredient concern · chemical identity, not food safety
