Reducing agents

sulphiting agents

ascorbic acid and analogs

cysteine

glutathione

Chelating agents

phosphates

EDTA

organic acids

Acidulants

citric acid

phosphoric acid

Enzyme inhibitors

aromatic carboxylic acids

aliphatic alcohol

anions

peptides

substituted resorcinols

Enzyme treatments

oxygenases

o-methyl transferase

proteases

Complexing agents

cyclodextrins