Glycine
The smallest amino acid and a major NMF component. Hydrates and provides building blocks for collagen synthesis.
Hygroscopic NMF component; precursor amino acid for collagen and glutathione.
- Hydrates
- Supports collagen synthesis precursors
- Soothes
What the evidence supports.
- All skin types
No notable contraindications reported.
Mid-routine serum or treatment step.
Concentration range in well-formulated products: 0.5%–5%
Year-round.
Collagen-rich foods, bone broth.
No specific deficiency signals tracked for this ingredient.
Always paired with other amino acids, limited solo impact.
The research behind Glycine.
Every claim on this page traces to published research. Findings below are drawn from randomized trials and systematic reviews, each links to the study on PubMed.
Journal of Clinical and Aesthetic Dermatology, 2014
No flagged conflicts. Still, patch-test new actives.
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