Amino acids
Glycine
Also called: glycine
A simple amino acid that is also a calming brain chemical.
- Why people take it
- Sleep, collagen production.
- What the evidence says
- Small studies suggest better sleep quality.
- How it is usually taken
- Usually 3 g at bedtime in sleep studies; 10 g or more with NAC in research on ageing.
- Be careful
- Generally safe. Avoid with clozapine.
- Medicines it can interact with
- May add to the effect of clozapine-type medicines; avoid with clozapine.
Other amino acids
Common questions
What is Glycine?
A simple amino acid that is also a calming brain chemical.
Why do people take Glycine?
Sleep, collagen production.
Does Glycine work?
Small studies suggest better sleep quality.
How much Glycine do people take?
Usually 3 g at bedtime in sleep studies; 10 g or more with NAC in research on ageing.
Is Glycine safe?
Generally safe. Avoid with clozapine.
Does Glycine interact with medicines?
May add to the effect of clozapine-type medicines; avoid with clozapine.
Sources and further reading
Last reviewed 31 October 2026. Written by Satya Babu.
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