Is glycine safe in skincare?

Glycine is an amino acid found in collagen and in many foods. The published evidence shows it has no safety concerns at the concentrations used in cosmetics. It's used in skincare to help preserve moisture and support skin barrier function.

Does glycine actually do anything for skin?

Glycine is one of the three amino acids in collagen, so there's theoretical support for its role in skin structure. Studies are limited, but the evidence doesn't suggest harm from using it in moisturizers and serums.

Is glycine vegan or natural?

Glycine can be derived from plant or animal sources or synthesized in a lab. Ingredient sourcing varies by brand, so check the product label if that matters to you.

humectant

Glycine

Generally safe·Strong evidence

The simplest amino acid, naturally present in skin and collagen, commonly used as a humectant to help retain moisture. It has a long history of safe use in cosmetics with no known hazards at typical concentrations.

Questions

Is glycine safe in skincare?: Glycine is an amino acid found in collagen and in many foods. The published evidence shows it has no safety concerns at the concentrations used in cosmetics. It's used in skincare to help preserve moisture and support skin barrier function.
Does glycine actually do anything for skin?: Glycine is one of the three amino acids in collagen, so there's theoretical support for its role in skin structure. Studies are limited, but the evidence doesn't suggest harm from using it in moisturizers and serums.
Is glycine vegan or natural?: Glycine can be derived from plant or animal sources or synthesized in a lab. Ingredient sourcing varies by brand, so check the product label if that matters to you.

Products with Glycine

References

Cosmetic information for general education, not medical advice. A verdict is a reading of the published evidence, never a guarantee for your skin: any ingredient can irritate someone, so patch test new products and see a professional if you react. Concern is graded on cited evidence, never on hazard-score lists. See how we score.