What it is
Glycine is a non-essential amino acid that functions as an inhibitory neurotransmitter in the central nervous system. It plays a role in collagen synthesis and may improve sleep quality and cognitive function.
Supplement · Amino Acid & Sleep
Glycine
3 g · gluten-free · 60 caps
brain-fogmemory-loss brainconnective tissue
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How it works
Glycine acts on glycine receptors in the brainstem, reducing neuronal excitability and promoting relaxation, which aids sleep onset. It also serves as a precursor for collagen production, essential for connective tissues.
Who should take it
Adults looking to address brain fog, memory decline, attention difficulty. Particularly relevant for people who prefer a targeted single ingredient and who have ruled out an underlying condition that needs medical care first.
Avoid / careful
Pregnant or nursing women without clinician oversight. People on prescription medication affecting the same pathway should consult a doctor before combining. Side effects are uncommon at recommended doses but mild GI upset can occur when starting.
When to take it
Morning
Noon
Evening
Night
How to take it
With food
Empty stomach
Before food
FAQs
Frequently asked
Can glycine be taken with other sleep aids?
Glycine can often be combined with other sleep aids, but it's crucial to consult your doctor to avoid additive effects or interactions, especially with sedatives.
How long does it take for glycine to work for sleep?
Many users report noticing improved sleep onset within the first week of consistent use. However, significant cognitive benefits may take 2-8 weeks to become apparent.
Is glycine habit-forming?
Glycine is not considered habit-forming. It is a naturally occurring amino acid involved in normal physiological processes.
Research
6 studies · 2010–2024
Evidence grade
ABCD
B · B · emerging-to-moderate human evidence for brain fog and memory concerns
From the blog
Editorial notes
SacredBod's longer take on Glycine — context the structured blocks above don't capture.
About Glycine
Glycine is a amino acid & sleep supplement used to support brain fog and memory concerns. Inhibitory amino acid for sleep onset and collagen synthesis. It is available in powder form and dosed for adults in India and internationally. As a western-tradition entry in the SacredBod catalog, it is positioned as a single-ingredient option that can be used on its own or layered into a broader protocol.
How it works
Glycine works through the mechanisms characteristic of its class — see the mechanism and research sections for detail. It primarily acts on the brain, nervous system, and effects are dose-dependent, typically becoming measurable within 2-8 weeks for noticeable cognitive effects. Consistency matters more than dose size for this category.
Who it’s for
Adults looking to address brain fog, memory decline, attention difficulty. Particularly relevant for people who prefer a targeted single ingredient and who have ruled out an underlying condition that needs medical care first.
Evidence
Glycine carries an evidence grade of B in the SacredBod catalog. Inhibitory amino acid for sleep onset and collagen synthesis. See the Research panel above for the underlying studies, participant counts and typical effect sizes.
Dosing & timing
Typical label dose is 3 g in powder form. Most adults can expect noticeable effects within 2-8 weeks for noticeable cognitive effects. Consistency matters more than a single large dose — take it daily and re-evaluate against your blood markers at 8–12 weeks.
Cautions
Pregnant or nursing women without clinician oversight. People on prescription medication affecting the same pathway should consult a doctor before combining. Side effects are uncommon at recommended doses but mild GI upset can occur when starting.
As part of the Amino Acid & Sleep category, Glycine can be used on its own or layered into a broader protocol — see the Goes with panel for synergistic pairings.
Added to your stack.