Back to Ingredient Dictionary

MERCAPTOPROPIONIC ACID

Description

Mercaptopropionic acid, also known as 3-mercaptopropionic acid or thiolactic acid, is a sulfur-containing organic compound with the chemical formula HSCH₂CH₂COOH. This versatile ingredient plays a significant role in various skincare and cosmetic formulations due to its unique properties and functions.

As a potent antioxidant, mercaptopropionic acid helps protect the skin from free radical damage and oxidative stress. It acts as a reducing agent, capable of breaking disulfide bonds in hair and skin proteins, making it valuable in hair removal products and chemical peels. The compound also exhibits chelating properties, which can help improve product stability and enhance the efficacy of other active ingredients.

In skincare, mercaptopropionic acid is utilized for its exfoliating and skin-brightening effects. It can help improve skin texture, reduce the appearance of fine lines, and promote a more even skin tone. The ingredient is often incorporated into professional-grade chemical peels and at-home exfoliating treatments.

While effective, mercaptopropionic acid requires careful formulation due to its potential for skin irritation at high concentrations. Proper pH adjustment and combination with soothing agents are essential for safe and effective use in skincare products.