The recall has been issued for some products due to higher than acceptable levels of benzene, a chemical linked to leukemia and other blood disorders.

Prednisolone (as sodium phosphate) 15mg/5mL; contains alcohol, benzoic acid; wild-cherry flavor. Systemic fungal infections, cerebral malaria, optic neuritis: not recommended. Tuberculosis.

He added: "Benzoyl peroxide is made from benzoyl chloride, which comes originally from toluene and benzoic acid so not from benzene. It should not react to form benzene so any benzene ...