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Glossarypyrrolidone carboxylic acid

naturally occurring compound that helps maintain skin moisture

Pyrrolidone carboxylic acid, also known as PCA, is a naturally occurring compound found in the skin that helps maintain moisture. It is a derivative of the amino acid glutamic acid and is often used in skincare and haircare products for its hydrating properties, as it can attract and retain water effectively.

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research Hair and Amino Acids: The Interactions and the Effects

5 citations, August 2007 in “PubMed”

Amino acids in conditioners improve hair strength, hydration, and color retention.

research New Plant Extracts Exert Complementary Anti-Hair Loss Properties in Human In Vitro and Ex Vivo Models

November 2024 in “Journal of Cosmetic Dermatology”

The plant extracts may help treat hair loss by promoting hair growth and reducing DHT levels.

research Amino Acids, Peptides, And Proteins In Cosmetic Science

5 citations, January 2017 in “Elsevier eBooks”

The document concludes that cosmetics need biocompatible, eco-friendly ingredients due to aging populations and demand for effective products.

research Resveratrol Derivatives: A Patent Review (2009–2012)

28 citations, September 2013 in “Expert Opinion on Therapeutic Patents”

New resveratrol-related compounds show promise for treating various health issues but need more research for clinical use.

research Cosmetics and Cosmeceutical Applications of Chitin, Chitosan, and Their Derivatives

233 citations, February 2018 in “Polymers”

Chitin and chitosan are useful in cosmetics for oral care, haircare, and skincare, including UV protection and strength improvement.

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