Histamines sometimes occur naturally in foods and when ingested can mimic an allergic reaction. Fermented foods such as cheese, and sauerkraut contain histamine, especially Blue cheese, Roquefort, and Parmesan.

The human body contains an enzyme called Diamine Oxidase that is responsible for the metabolizing of histamines. When the histamine-metabolizing enzyme Diamine Oxidase is saturated and the enzyme cannot metabolize any more of the histamine ingested then an allergic like reaction can occur.

i ave no idea wot d answer is

Histamine is classified as a monoamine versus a diamine. There are other types on monoamines including serotonin, epinephrine, norepinephrine, dopamine, and melatonin.

no.coryne bacterium is oxidase negative.

Carbamide and Carbonyl diamine