The correlation between human plasma melatonin levels and urinary 6-hydroxymelatonin excretion.
A significant correlation (0.76) has been found between nighttime peak plasma melatonin levels and the 24-h urinary excretion totals for conjugated 6-hydroxymelatonin for a group of 22 women. This study validates the comparison of plasma levels of the hormone or urinary levels of its metabolite to assess pineal gland production of melatonin in humans.
D000293:Adolescent; D000328:Adult; D000368:Aged; D002940:Circadian Rhythm; D005260:Female; D006801:Humans; D008550:Melatonin / Q000031:analogs & derivatives* / Q000097:blood* / Q000652:urine; D008875:Middle Aged; D011863:Radioimmunoassay
D008550:Melatonin; C012365:6-hydroxymelatonin