Alanine at a glance

  • An amino acid, one of the building blocks for the creation of protein
  • Occurs naturally in the human body
  • Significantly impacts skin’s appearance due to its protein-building capabilities
  • Exhibits calming properties when applied topically

Alanine description

Alanine is an amino acid that is used as one of the building blocks for the creation of protein. It is considered a non-essential amino acid, meaning that since it is produced by the body it does not have to be consumed as part of the human diet. Amino acids significantly impact skin appearance because they are the basis for fibrous proteins in skin, including collagen, elastin, and keratin. Topically, amino acids have been shown to have a positive impact in helping skin retain moisture. Alanine in particular exhibits calming properties when applied to skin.

Alanine references

  • Amino Acids in Nutrition and Health, August 2020, pages 187-199
  • Current Medicinal Chemistry, December 2018, pages 5,512-5,527
  • Marine Drugs, March 2018, ePublication
  • PLoS ONE, February 2018, ePublication
  • International Journal of Cosmetic Science, August 2009, pages 327-345

Peer-reviewed, substantiated scientific research is used to assess ingredients in this dictionary. Regulations regarding constraints, permitted concentration levels and availability vary by country and region.

Ingredient ratings


Proven and supported by independent studies. Outstanding active ingredient for most skin types or concerns.


Necessary to improve a formula's texture, stability, or penetration.


Generally non-irritating but may have aesthetic, stability, or other issues that limit its usefulness.


There is a likelihood of irritation. Risk increases when combined with other problematic ingredients.


May cause irritation, inflammation, dryness, etc. May offer benefit in some capability but overall, proven to do more harm than good.


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Not rated

We have not yet rated this ingredient because we have not had a chance to review the research on it.