correlational
Taking 3 grams of glycine before bed might help people feel less sleepy during the day
Scientific Claim
Glycine ingestion (3 g) before bedtime is associated with reduced daytime sleepiness in individuals with chronic unsatisfactory sleep, as measured by the Stanford Sleepiness Scale
Original Statement
“Glycine lessened daytime sleepiness and improved performance of memory recognition tasks.”
Evidence Quality Assessment
Claim Status
overstated
Study Design Support
Design supports claim
Appropriate Language Strength
association
Can only show association/correlation
Assessment Explanation
The study uses 'lessened' which implies causation, but the design lacks clear randomization and blinding details, so it should be stated as association rather than causation.
Evidence from Studies
No evidence studies found yet.