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Amino Acid

Glycine

Also known as: Gly

B
Evidence

Simplest amino acid with diverse roles in collagen synthesis, sleep quality, neurotransmission, and detoxification.

Primary uses

  • Sleep quality
  • Collagen synthesis
  • Detoxification
  • Neuroprotection

How it works

  • Inhibitory neurotransmitter
  • Precursor to glutathione
  • 1/3 of collagen amino acids
  • Lowers core body temperature

Dosage

Typical range
3-5 g before bed for sleep; up to 10-15g for other uses
Timing
Before bed for sleep
With food
Optional
Duration
Safe long-term
Special populations
Poor sleepers, detox support

Forms

  • Powder
  • Capsules

Safety

Common side effects

  • Mild sedation
  • GI upset at high doses

Contraindications

  • None

Known interactions

Evidence notes

Growing evidence for sleep and health

Grade B: Some human trials support key claims; further confirmation needed.

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Medical disclaimer. This page is educational and does not replace advice from a qualified healthcare provider.