The Ordinary PHA 5% Exfoliating Lip Serum 0.5 fl oz — gentle overnight exfoliant, hydrating with glycerin & ectoin

The Ordinary PHA 5% Exfoliating Lip Serum is a gentle, chemical overnight lip exfoliant that smooths and hydrates lips while supporting the skin barrier.

Designed to replace physical scrubs, this compact 0.5 fl oz serum uses 5% gluconolactone (a PHA) with 1.5% AHAs to loosen and remove dead lip skin on the surface while delivering long-lasting moisture. Its formula includes more than 50% glycerin and ectoin to attract and lock in hydration, plus a plant-derived black carrot extract that adds antioxidant support and a light pink tint. Clinical testing showed improved lip moisture content in short-term use, and the product is intended for use as an overnight treatment or as an occasional gentle exfoliation step.

How does this serum smooth and renew lips without harsh scrubbing?

The Ordinary uses polyhydroxy and alpha hydroxy acids that act on the surface layer to gently loosen bonds between dead cells rather than abrading them away. PHAs have larger molecules than many acids, so they offer milder exfoliation suitable for sensitive areas like the lips. Regular application encourages a more even texture and a smoother look without mechanical irritation.

• 5% gluconolactone (PHA) for surface-level exfoliation
• 1.5% AHAs to promote gentle cell renewal
• Non-abrasive chemical action ideal for delicate lip skin

Will this product hydrate lips while exfoliating?

Yes — the serum pairs exfoliating acids with high concentrations of humectants and barrier-supporting ingredients to both remove dry skin and restore moisture. Glycerin draws and retains water in the lip tissue, and ectoin helps maintain barrier integrity so hydration lasts longer. This combination reduces flaking while improving softness and plumpness over repeated use.

• >50% glycerin for potent moisture retention
• Ectoin to support and protect the lip barrier
• Clinical testing indicated increased moisture after short-term use

How should I use the serum safely and when will I see results?

Apply a thin layer to clean, dry lips on alternate evenings or as directed, letting it dry before sleeping; follow with a soothing lip balm if desired. Avoid applying to cracked or irritated skin, and use SPF during daytime because exfoliation can increase sun sensitivity. Visible smoothing and improved texture often appear after a few applications, with ongoing improvement over two weeks of intermittent use.

• Apply on alternate nights to unbroken skin only
• Allow to dry; layer balm over if additional occlusion is wanted
• Use daily SPF when exposed to sun after exfoliation

What sensory notes and appearance should I expect?

The formula has a light pink hue from black carrot extract that may vary batch-to-batch and does not affect performance. You may notice a slightly tangy taste when the acids are active — this is normal and food-grade. Texture is a thin, serum-like gel that dries down, so it sits comfortably under night lip treatments or balms without feeling gritty.

• Plant-derived black carrot gives mild pink color and antioxidants
• Thin serum texture absorbs and dries without residue
• Slightly tangy taste from exfoliating acids is expected

Who this is for: ideal for anyone wanting a low-irritation alternative to scrubs—people with dry, flaky, or uneven lips who prefer chemical exfoliation and barrier-supporting hydration. Not recommended for compromised or actively chapped lips; consult product usage guidance if you have extreme sensitivity. Suitable to pair with a gentle nightly balm and daytime sun protection for best results.

Ingredients

GLYCERIN, AQUA/WATER/EAU, GLUCONOLACTONE, ECTOIN, DAUCUS CAROTA SATIVA (CARROT) JUICE, CITRIC ACID, MALIC ACID, TARTARIC ACID, SODIUM HYDROXIDE, XANTHAN GUM, POTASSIUM SORBATE, SODIUM BENZOATE.