correlational
Taking 3 grams of glycine before bed might help people who have trouble sleeping remember things better
Scientific Claim
Glycine ingestion (3 g) before bedtime is associated with improved memory recognition performance in individuals with chronic sleep dissatisfaction
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 'improved' which implies causation, but the design is a non-randomized cohort study with unclear blinding and control group status. Only association can be claimed.
Evidence from Studies
No evidence studies found yet.