Taking 3 grams of glycine before bed doesn't seem to change the overall structure of sleep stages
Scientific Claim
Glycine ingestion (3 g) before bedtime does not significantly alter sleep architecture in individuals with poor sleep
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 'without changes' which implies causation, but the design (cohort study) cannot establish causation. Only association can be claimed.
More Accurate Statement
“Glycine ingestion (3 g) before bedtime is associated with no significant changes in sleep architecture in individuals with poor sleep”
Evidence from Studies
No evidence studies found yet.