title: Circadian rhythms of beta-endorphin in the aged.
abstract: A circadian rhythm for beta-endorphin was observed by means of the cosinor method in aged subjects. The rhythm mesor is a little lower but its amplitude is more extended than in young subjects. The confidence intervals of the acrophases of the two groups are superimposable with a timing in the morning.
mesh_terms: D000328:Adult; D000368:Aged; D000375:Aging; D002940:Circadian Rhythm; D004723:Endorphins / Q000097:blood*; D005260:Female; D006801:Humans; D007700:Kinetics; D008297:Male; D001615:beta-Endorphin
chemical_list: D004723:Endorphins; D001615:beta-Endorphin