Niacin is resistant to heat, air and oxidant, but it is hydrolysed in strong acids and alkaline solutions. It is assumed to be the most stable water-soluble vitamin. The losses of niacin are caused mainly byleachong into cooking water. Retention of niacin is in the range of 45-90% within the various culinary treatments of meat and legumes. In comparison with the classical procedure, short pressure-cooking could increase niacin retention in legumes, except in soybeans. Reviewed results are summarized in table10