Peptide Atlas · Small molecule

Glycine

Glycine crystallizes during freezing: cooling 15% solutions produced beta-glycine, quench-cooling in liquid nitrogen left an amorphous freeze-concentrate, and annealing converted beta- to gamma-glycine.

emerging

provisional
PubChem 750
4 citations
0 discussions
0 followers
Aminoacetic acid
Gly

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What the evidence says

six tiers, never blended

emerging — human data exists, and it is thin or contested

every claim resolves to its source

All 4 citations resolve to their original source. · 0 posts naming it, 0 members counted once each.

Evidence, kept apart

The Atlas never mixes evidence types into one blob. Each claim below carries the tier it actually sits in; an unresolved citation is shown and does not move the page.

Evidence map for Glycine. Tier reflects study design, not enthusiasm.
Claim	Tier	Source
Glycine before bedtime reduced fatigue after sleep restriction in healthy volunteers	emerging	pmid 22529837
Phase transitions of glycine in frozen solutions and during freeze-drying	preclinical	pmid 11697471
Glycine crystallization: effect of pH and buffer concentration	preclinical	pmid 17245648
Review: glycine's receptors and its sleep-related actions in rats and humans	preclinical	pmid 22293292

Unanswered questions

No open questions on file. Either everything about this molecule is known, or nobody has admitted what is not.

Negative findings

failure is information

Nobody has filed a failure yet. Failures are information; this list is waiting for an honest one.