OPIOID ACTIVITY OF HIGH-PROTEIN SUPPLEMENT FOR SPORTSMEN.
 
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Pol. J. Food Nutr. Sci. 2008;58(2):247–250
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ABSTRACT
Recent investigations have suggest that special food should be evaluated not only from the nutritional but also from the physiological point of view. Opioid peptides derived from milk proteins belong to compounds whose physiological importance has not been fully recognized. Two opioid peptides with agonistic activity (β-casomorphin-5 and -7) were found in a peptide extract from the high-protein supplement (Ultimate Protein) and its pepsin-trypsin hydrolysate. It was concluded that the presence of β-casomorphin-5 and -7 in the peptide extract from high-protein supplement is probably caused by hydrolysis of milk proteins by native enzymes of milk and technological processing. In conclusion, a question arises about consequences of a high intake of food proteins being the precursors of opioid peptides.
ISSN:1230-0322