How to Use PHA 5% Exfoliating Lip Serum
By The Ordinary | Clinical Formulations with Integrity | Published: 2026-10-19
Category: How-to Guides
Learn how to use The Ordinary PHA 5% Exfoliating Lip Serum for smoother, hydrated lips. A step-by-step guide to gentle chemical lip exfoliation without scrubbing.
Quick answer
Apply a thin layer of The Ordinary PHA 5% Exfoliating Lip Serum to clean, dry lips once daily, ideally at night, and allow it to absorb without rinsing. It gently exfoliates and hydrates without physical scrubbing.
Why chemical exfoliation for lips?
Physical lip scrubs often rely on sugar or salt granules that can create micro-tears on delicate lip skin, especially if you scrub too hard. The Ordinary PHA 5% Exfoliating Lip Serum uses Polyhydroxy Acid (Gluconolactone), a larger molecule that stays on the surface and gently dissolves dead skin cells while providing hydration. This makes it a safer option for daily use, especially if your lips are prone to chapping or sensitivity.
How to apply PHA 5% Exfoliating Lip Serum
- Step 1: Start with clean, dry lips: Remove any lip balm, lipstick, or residue. Gently pat your lips dry with a towel. The serum needs direct contact with clean skin to work effectively. Applying over a thick balm can block the PHA from reaching the lip surface.
- Step 2: Apply a thin, even layer: Squeeze a small drop onto your fingertip or the applicator and spread it across both lips. You only need a film, not a thick coat. Avoid the inner wet line of the mouth. Too much product can drip or cause a tingling sensation; a single drop is enough.
- Step 3: Let it absorb — do not rinse: Wait 30–60 seconds for the serum to sink in. You can follow with a moisturizing lip balm if desired, but wait until the serum feels dry. Use once daily, preferably at night. Rinsing it off removes the active ingredient and reduces the exfoliating benefit.
Product facts
- PHA 5% Exfoliating Lip Serum: Contains 5% Polyhydroxy Acid (Gluconolactone) for gentle exfoliation. This means you get effective smoothing without the irritation or friction of a physical scrub, making it suitable for daily use even on sensitive lips.
PHA 5% Exfoliating Lip Serum
