Amino Acid
Glycine (for Relaxation)
Also known as: Gly, Aminoacetic acid
B
Evidence
Simplest amino acid with profound calming and sleep effects. Lowers body temperature.
Primary uses
- Sleep quality
- Relaxation
- Cognitive function
How it works
- Lowers core body temperature
- Inhibitory neurotransmitter
- Collagen precursor
Dosage
- Typical range
- 3g before bed
- Timing
- 30-60 min before bed
- With food
- Either
- Duration
- Safe nightly
- Special populations
- Sleep quality, temperature regulation
Forms
- Powder
- Capsule
Safety
Common side effects
- Well tolerated
- Sweet taste
Contraindications
- None known
Evidence notes
Good evidence for sleep improvement
Grade B: Some human trials support key claims; further confirmation needed.
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