What can you say about glycine in your ads and on your site?

The library supports 1 wording for glycine; the strongest is “Provides a non-essential amino acid involved in muscle protein synthesis” (moderate, 160-1,800 mg a day). Avoid wording that names or implies a disease, a drug or a treatment, such as “Treats insomnia, or a cure for sleep problems”.

Also called: Aminoacetic acid

Reviewed 15 October 2026

Not legal advice. This guide shows the wording that published evidence supports at a daily dose, from the sources linked below; it is not a ruling on any claim. Your own product, its form and dose, and your own evidence still need to match the wording you use.

Supported wordings

What you can say.

Moderate evidenceWording 1

Claims Facts

“Provides a non-essential amino acid involved in muscle protein synthesis.”

Daily dose	160-1,800 mg a day
Support	Health Canada lists it at 160 mg to 1.8 g a day; no other listed source covers glycine.
Dose details	Adults 18 and older. Health Canada lists this use in its workout supplements monograph, for products with at least one non-essential amino acid at or above its minimum dose; for glycine that is 160 mg a day, and the maximum is 1.8 g a day.
Form	Glycine, taken by mouth, as in a workout supplement
Source	Health Canada monograph: Workout Supplements

How strong the evidence is

Strong evidence: At least two listed sources support it independently at a comparable dose and form, and none disagrees.
Moderate evidence: One listed source supports it as an evidence-based use at that dose, and no listed source disagrees.
Limited evidence: The only support is traditional use, the sources disagree, or the source itself calls the evidence weak.

Wordings to avoid

What to leave out.

Claims Facts

Ingredient: Glycine

Wording to avoid	Reason
“Treats insomnia, or a cure for sleep problems”Names a sleep disorder and promises to treat it; no listed source supports sleep wording for glycine.	Treatment
“Works like a sleeping pill”Compares the product to a drug.	Drug
“Lowers blood sugar in diabetes”Names a disease; no listed source supports it.	Disease

Disease: names or implies a disease. Drug: names a drug or presents the product as one. Treatment: promises to treat, cure or prevent a condition.

Sources

Where this comes from.

Health Canada monograph: Workout Supplements

All ingredient guides

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