La Roche-Posay Glycolic Acid Serum 10% with Tranexamic & Kojic Acids — Brightening, Soothing B5 (Evening)

La Roche-Posay Glycolic B5 is a lightweight evening facial serum that combines 10% glycolic acid with tranexamic and kojic acids plus vitamin B5 to reduce the appearance of dark spots and promote a more even-looking skin tone.

This targeted serum uses a concentrated acid complex to gently exfoliate surface dead skin and address visible discoloration while supporting skin comfort with panthenol (vitamin B5). Formulated to be lightweight, non-comedogenic and fragrance-free, it’s designed for use in an evening routine alongside daytime sun protection. Clinical testing by the brand shows improved radiance and a reduction in the look of dark spots over several weeks when used as directed.

How does this serum help reduce dark spots and uneven tone?

The formula combines a trio of actives—glycolic acid, tranexamic acid (TXA) and kojic acid—that work in complementary ways. Glycolic acid exfoliates the skin’s surface to reveal fresher skin, while TXA and kojic acid target visible discoloration and help even out pigment appearance.

• 10% pure glycolic acid for effective surface exfoliation.
• Tranexamic acid to address the appearance of stubborn discolorations.
• Kojic acid supports reduction of uneven pigmentation.
• Vitamin B5 (panthenol) soothes and helps maintain moisture balance.

Is this suitable for sensitive skin and daily use?

The serum is formulated to be lightweight and is labeled fragrance-free and non-comedogenic, but because it contains a 10% AHA concentration you should introduce it gradually. Apply 3–4 drops in the evening and monitor tolerance; if irritation occurs, reduce frequency or consult a skincare professional.

• Alcohol-free and paraben-free formulation to minimize irritation risk.
• Allergy tested and dermatologist-tested for safety on sensitive skin.
• Start with fewer evenings per week, then increase as tolerated.

How quickly will I see results and how should I use it with sunscreen?

Visible changes in radiance may appear within about two weeks, while noticeable reduction in dark spots is typically reported after several weeks of consistent use. Because glycolic acid increases sun sensitivity, daytime SPF is essential every day while using this serum.

• Apply 3–4 drops in the evening to clean, dry skin.
• Use a broad-spectrum sunscreen each morning while on this treatment.
• Avoid combining with other strong exfoliants without professional guidance.

What are the key ingredients and what do they do?

The active blend centers on exfoliating and pigment-targeting acids plus a skin-conditioning provitamin. The complementary ingredients help refine texture while maintaining comfort for many skin types.

• Glycolic Acid (10%): exfoliates and refines surface texture.
• Tranexamic Acid and Kojic Acid: work on visible discoloration and tone irregularities.
• Lipo-hydroxy acid (LHA) and capryloyl salicylic acid: gentle resurfacing benefits.
• Vitamin B5 (panthenol): helps soothe and hydrate treated skin.

Who is this for: La Roche-Posay Glycolic B5 is aimed at adults seeking a dermatologist-backed, lightweight serum to address visible dark spots, age spots and uneven skin tone while maintaining a formulation suited to sensitive skin types. It’s appropriate for multiple skin tones and for those ready to include an AHA-based exfoliant in their evening routine—provided they commit to regular daytime sun protection.

Ingredients

Water, Alcohol Denat., Glycolic Acid, Propylene Glycol, Potassium Hydroxide, Kojic Acid, Ammonium Polyacryldimethyltauramide/Ammonium Polyacryloyldimethyl Taurate, C12-13 Alkyl Lactate, Disodium EDTA, Hydroxyethylcellulose, Capryloyl, Salicylic Acid, Vitreoscilla Ferment.