Compound library
Understand what people are taking.
Browse medicines, supplements, herbs, and health foods. Each profile brings community reports and linked research into one clear view.
Browse medicines, supplements, herbs, and health foods. Each profile brings community reports and linked research into one clear view.
The simplest amino acid: an inhibitory brain messenger and a building block of collagen and glutathione. Human evidence is thin. Small trials report better sleep and less next-day tiredness with 3 g at bedtime, and one 74-person trial lowered HbA1c in type 2 diabetes, but a 2024 systematic review rates the sleep studies as small with a high risk of bias. 'GlyNAC' trials combine it with NAC, so they cannot show what glycine does alone.
2 of 5 results reported a benefit, from 1 published study.
1 randomised trial
These are the figures the studies reported, not a prediction for any one person. Where several studies measured the same thing in the same unit, we show a simple average and say so. Every individual result is listed below.
See every resultShort-term memory, recall, and age-related memory decline.
Also known as: Glycine supplement
Every published result for this pair, extracted and audited.
These charts group published studies by what they reported and how they were run — green marks studies that reported a benefit for this pairing. Tiers run from pooled analyses of many trials (strongest) to one-off observational reports.
Direction of reported outcomes for Glycine in memory.
Study designs behind these findings.
Every measured outcome, one row per finding - numbers exactly as reported.
| Study | Design | n | Duration | Outcome measured | Reported result | Direction |
|---|---|---|---|---|---|---|
| PMID 10587285 1999 | Randomised trial | - | - | Divided attention | reported qualitatively | No benefit |
| PMID 10587285 1999 | Randomised trial | - | - | Focused attention | reported qualitatively | No benefit |
| PMID 10587285 1999 | Randomised trial | - | - | Mood | reported qualitatively | No benefit |
| PMID 10587285 1999 | Randomised trial | - | - | Retrieval from episodic memory | reported qualitatively | Benefit |
| PMID 10587285 1999 | Randomised trial | - | - | Sustained attention | reported qualitatively | Benefit |
Hand-selected PubMed studies, linked to the originals.
Ordered by strength of evidence, then result direction.
01Comparative effects of Bacopa monnieri and Ginkgo biloba on cognitive functions: A systematic review and network meta-analysisTiemtad P, et al. · Phytomedicine : international journal of phytotherapy and phytopharmacology · 2026PMID 41678913 ↗02Efficiency of Different Supplements in Alleviating Symptoms of ADHD with or Without the Use of Stimulants: A Systematic ReviewAl Shahab S, et al. · Nutrients · 2025PMID 40362791 ↗03Plant-derived nootropics and human cognition: A systematic reviewLorca C, et al. · Critical reviews in food science and nutrition · 2023PMID 34978226 ↗04Dietary Flavonoids and Human Cognition: A Meta-AnalysisCheng N, et al. · Molecular nutrition & food research · 2022PMID 35333451 ↗05Be the first to share what you noticed with Glycine for memory. Why counts start empty.