PHAs, or polyhydroxy acids, are a type of chemical exfoliant used in skincare. They're gentler than AHAs (alpha hydroxy acids) and BHAs (beta hydroxy acids), making them ideal for sensitive skin. PHAs work by exfoliating the skin, removing dead skin cells to reveal brighter, smoother skin. This process also improves skin texture and tone.
Benefits of PHA for Skin
- Improved Skin Texture and Tone: PHAs gently remove dead skin cells, leading to a smoother, more even complexion.
- Reduced Appearance of Fine Lines and Wrinkles: By stimulating cell turnover, PHAs help improve skin elasticity, minimizing the look of fine lines and wrinkles. Healthline and NeoStrata both highlight this benefit.
- Faded Dark Spots and Hyperpigmentation: The exfoliating and cell turnover stimulation properties of PHAs can help reduce the appearance of dark spots and hyperpigmentation. [Source: Reference material provided - March 21, 2023]
- Hydration: Unlike some other exfoliants, PHAs are also hydrating, making them suitable for dry and sensitive skin. Clinikally emphasizes this moisturizing effect.
- Gentle Exfoliation: PHAs are less likely to cause irritation compared to AHAs and BHAs, making them a good choice for sensitive skin. Allure, Typology, and Aveeno all point to the gentle nature of PHAs.
Common PHAs
The most common PHAs include gluconolactone, galactose, and lactobionic acid. Good Housekeeping provides this list of common PHAs.
How PHAs Work
PHAs work by gently dissolving the bonds between dead skin cells, allowing them to be easily shed. This process improves skin cell regeneration and boosts hydration. Byrdie discusses the mechanism of PHAs.
