Grade A
Meta analysis
Glycine Supplementation and Sleep Quality: Meta-Analysis
Meta-analysis of glycine supplementation effects on sleep quality, morning alertness, and cognitive performance.
Published 2024
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[STUDY DETAILS]
- Study Type
- Meta analysis
- Quality Grade
- A
- Publication Year
- 2024
- Category
- Sleep & Recovery
Summary
Analysis of 8 RCTs (n=384) found 3g glycine before bed reduced sleep onset latency by 8 minutes, improved subjective sleep quality, and enhanced next-day cognitive function.
Key Findings
1. Sleep onset -8 minutes
2. Subjective quality improved 22%
3. Next-day alertness +18%
4. Works via core body temperature reduction