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Glycine explained: what it is and its uses

The NIH (US National Institutes of Health) says glycine is an amino acid. The US FDA says it can mask saccharin's bitter aftertaste in manufactured beverages and beverage bases and stabilize mono- and diglycerides made from edible fats or oils. One product we reviewed lists glycine, and none prints its individual amount per serving.

By HowNook's Health desk · Updated

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What it is
Amino acid
In the products we reviewed
1, its label does not print the amount

What glycine is

  • Glycine is an amino acid.1
  • Glycine can be used in manufactured beverages and beverage bases to mask saccharin's bitter aftertaste.2
  • Glycine can be used to stabilize mono- and diglycerides made from edible fats or oils.2

How much glycine each product gives

Per serving, as each label prints it

Amount not printed: the dashed line shows the most it can be, the whole blend

NeuroQuietNot printed · at most 1,000 mg

Before you take it

Ask a doctor first

  • Beverages prepared from beverage bases containing added glycine must contain no more than 0.2 percent glycine.2

These statements have not been evaluated by the FDA. A supplement is not a medicine.

The product we reviewed that lists glycine

ProductForm and servingGlycine per servingOur scorePrice a bottleBuy
NeuroQuiet#3 in hearing supportOral spray6 spraysNot printedIn the 1000 ng HGA Blend9.7$49Check price
Prices checked Oct 9, 2026

Questions people ask

Is glycine an amino acid?

Yes, the NIH (US National Institutes of Health) says glycine is an amino acid.

What is glycine used for?

Glycine can mask saccharin's bitter aftertaste in manufactured beverages and beverage bases, according to the US FDA. The FDA also says it can stabilize mono- and diglycerides made from edible fats or oils.

Which supplements we reviewed contain glycine?

NeuroQuiet, an oral spray, is the only product we reviewed that lists glycine. Its serving is 6 sprays.

How much glycine is in NeuroQuiet?

NeuroQuiet does not print a separate glycine amount per serving. It lists glycine inside its 1000 ng HGA Blend, with a serving of 6 sprays.

Sources

The products, amounts and prices come from each product's label and checkout, as its review shows them. AI drafts our pages from listed sources, figures are checked against them, and we have not tried the products.

  1. 1NIH National Cancer Institute Thesaurus, Glycineevsexplore.semantics.cancer.gov/evsexplorechecked
  2. 2US Code of Federal Regulations, 21 CFR 172.812, Glycineecfr.gov/currentchecked