The invention relates to a nutritional intervention composition in powder
form that is taken before a meal and that extends post meal satiety. The
compositions of the invention are comprised of at least one protein,
C.sub.12-18 fatty acids, preferably oleic acid, all of which stimulate CCK
release in the body, and a source of proteinase inhibitor which acts to
prevent the deactivation of CCK. The subject compositions preferably
additionally contain a source of calcium and are advantageous in that they
utilize a source of proteinase inhibitor as opposed to the more costly
extracts. The source of proteinase inhibitor is advantageously an extract
of potato, soy, or beans containing about 10 weight percent of proteinase
inhibitor. The powder compositions are mixed with a suitable liquid,
preferably water, prior to ingestion.