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Glycine
A small amino acid with a calming effect. It's also a main building block of collagen and glutathione.
Commonly used for
- Sleep quality
- Calm and relaxation
- Collagen and connective tissue support
- Glutathione support (often paired with NAC)
Found naturally in
- Your body makes it
- Bone broth and gelatin
- Collagen
- Meat, poultry skin, and fish
Label red flags
- Sleep blends where glycine is a small part of a proprietary mix
Check with a provider
- Pregnancy or breastfeeding (not well studied as a supplement)
- Taking clozapine. Glycine may make it less effective.
- Taking sedatives or sleep medicines
Supplements that contain it
Brand nameProduct nameSleep formulasComing soon
Brand nameProduct nameMagnesium glycinateComing soon
Brand nameProduct nameCollagen and protein powdersComing soon
Brand nameProduct nameGlutathione support formulasComing soon
Brand nameProduct nameSleep formulasComing soon
Brand nameProduct nameMagnesium glycinateComing soon
Parts of the body it affects
Explore what each area does and the conditions that can affect it.
Illustrations: Servier Medical Art, CC BY 4.0
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Dr. Lesher is a naturopathic doctor who specializes in women's autoimmune and chronic conditions. Since 2020, she has helped more than 900 patients overcome and heal from their conditions.