Glycine
Learn what Glycine (E640) is, why it's added to food, whether it's safe, and which products contain it.
Generally recognized as safeWhat is Glycine?
A food additive with the role of a flavor enhancer (flavor modifier), obtained from sugarcane, gelatin, or synthetically. Glycine is a naturally occurring amino acid in proteins. The human body synthesizes it without needing an external source. It is primarily used as a nutrient for baking yeast, as a leavening agent for bread, and in some dietary supplements.
Why is Glycine added to food?
Glycine (E640) is a flavor enhancer commonly found in: Bakery products.
Permitted quantity: No specified daily limit.
Is Glycine banned anywhere?
✓ Not currently banned in the EU or known to be restricted in other countries.
Is Glycine okay for kids?
Not permitted in foods intended for infants and young children.
Common foods that contain Glycine
- Bakery products
How to spot Glycine on labels
Look for any of these names in the ingredients list:
- E640
- Glycine
Common misspellings to watch for:
- glyclne
- glyeine
- glycine
- qlycine
Better alternatives
• Excess glycine: Although glycine is considered safe in moderate amounts, excessive consumption can lead to side effects such as dizziness, drowsiness, or diarrhea. It is recommended to follow the recommended dosage on the product label.
Also known as
- glyclne
- glyeine
- glycine
- qlycine
Scan products with BioBrief
Not sure if a product contains Glycine? BioBrief scans the barcode and instantly shows you every additive in the ingredients list — including E640 — with a plain-language explanation.
Frequently asked questions about Glycine
- Is Glycine safe to eat?
- Glycine has a harm level of 0 out of 3. Generally recognized as safe.
- Is Glycine banned anywhere?
- Glycine is not currently banned in the EU or known to be restricted in other countries.
- Is Glycine safe for children?
- Not permitted in foods intended for infants and young children.
- How do I spot Glycine on a food label?
- Look for E640, Glycine in the ingredients list. It may also appear as: glyclne, glyeine, glycine.
Ingredients change. Always check the actual product label before purchasing. Information on this page is for educational purposes only.