Taking 3 grams of glycine before bed doesn't seem to change the overall structure of sleep stages, according to sleep monitoring
Scientific Claim
Glycine ingestion (3 g) before bedtime is associated with no significant changes in sleep architecture in individuals with chronic sleep dissatisfaction
Original Statement
“Glycine improved subjective sleep quality and sleep efficacy (sleep time/in-bed time), and shortened PSG latency both to sleep onset and to slow wave sleep without changes in the sleep architecture.”
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 definitive language ('without changes') but is an observational cohort study without confirmed randomization or control group, so causation cannot be established. The verb should reflect association rather than causation.
Evidence from Studies
No evidence studies found yet.