Fermentation of food is one of the earliest food processing
methods known by man. It is a metabolic process by yeast or bacteria
that converts sugar into organic acid, alcohol and carbon
dioxide under anaerobic condition. The resulting metabolites produced
during fermentation can then enhance a food’s flavour profile,
nutritional value, as well as serving the preservation purpose
(Caplice & Fitzgerald, 1999). In addition to these valuable characteristics,
fermentation by microorganisms could enrich the products
further, providing excellent source of health beneficial
bioactive compounds