Glow Definition
PHA or polyhydroxy acid in skincare refers to a type of gentle chemical exfoliant known for its larger molecular structure and moisture-attracting properties. Unlike its AHA and BHA cousins, PHA works primarily on the skin’s surface, loosening dead skin cells while helping the skin maintain hydration.
Found in formulas like toners, serums, and overnight masks, PHAs such as gluconolactone or lactobionic acid are often favored in routines seeking a more delicate touch — especially for those with sensitive skin that tends to react to stronger actives.
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Why It Matters
Not all exfoliants are created equal. PHAs offer a gentler path to glow, working slowly on the skin’s surface without deeply penetrating like glycolic or salicylic acid. That makes them a strategic pick for skin that’s sensitive, reactive, or simply in need for a reset without the risk of overdoing it.
Even more? Many PHAs double as humectants — helping your skin hold onto water while it sheds what it doesn’t need.
GLOW TIP Try layering a PHA toner underneath your moisturizer on nights when your skin feels dull but sensitive — it’s an easy way to ease into exfoliation without disrupting your barrier.
Why We Love It For Glow
PHA is the kind of ingredient we lean on when our glow needs restoring, but our skin isn’t up for a full reset. After long flights, stressful weeks, or a little too much experimentation with actives, it brings skin back to a smoother, softer place — without ever overstepping. It’s especially loved in routines where barrier health and radiance are non-negotiable.
Unlike stronger acids that demand caution, PHAs in skincare let us keep the glow going even during skin’s more sensitive moments. Its water-binding properties also mean it works overtime: not just exfoliating, but attracting hydration in the process — leaving your skin looking more plump and luminous, never stripped. If you’re looking for an exfoliant that quietly supports glow goals while playing well with other ingredients (and skin moods), PHA earns its place.
Reach for NEOSTRATA PHA Renewal Face Pads — pre-soaked exfoliation pads with polyhydroxy acids, green tea, and cucumber extract to smooth, calm, and subtly refine.
These swipe-on multitaskers combine gentle PHA exfoliation with antioxidant-rich green tea and soothing cucumber — making them a luxe-feeling ritual that skips the sting and brings the glow. The perfect reset for dull days or post-travel skin.
FAQ
Are polyhydroxy acids good for sensitive skin types looking for gentle exfoliation?
Yes, PHAs are often recommended for sensitive skin types because of their larger molecular size, which slows down penetration and reduces the risk of irritation. They gently exfoliate while offering added hydration support, making them a standout choice for barrier-conscious glow routines.
What’s the difference between PHAs and AHAs in exfoliating skincare products?
While both are chemical exfoliants, PHAs are considered gentler than AHAs. PHAs exfoliate at the surface level and are less likely to cause sensitivity or stinging. This makes them ideal for those easing into acids or layering with other active ingredients in a balanced skincare routine.
Can I use PHA products with other actives like retinol or vitamin C?
PHAs tend to play well with others, especially in low concentrations. Their gentle nature makes them more forgiving when layered with other actives — but it’s still best to alternate or patch test when combining ingredients like retinoids or L-ascorbic acid for the first time.