Study abstract: melatonin may dull morning cognition in healthy young adults

A 2023 abstract in a SLEEP journal conference supplement reports that melatonin supplementation was associated with impaired cognitive performance the following morning in healthy young adults. Beyond that single headline claim, no substantive content is available to summarize: the source text provided contains only the title, with no abstract body, study design, dosing, sample size, or measured effects. A faithful summary of the actual findings cannot be written from what was supplied.