La Roche‑Posay Effaclar Ultra Concentrate Serum 30 ml
A high-performance, dermatologically tested serum combining a tri-acid complex (salicylic acid, glycolic acid, LHA) with niacinamide and thermal spring water. Designed for adult acne-prone and sensitive skin, it gently exfoliates, unclogs pores, refines texture, and reduces blemishes and fine lines.
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“What is Effaclar Ultra Concentrate Serum?”

Effaclar Ultra Concentrate Serum is a gentle nightly peeling serum with salicylic, glycolic, and lipo-hydroxy acids, enriched with niacinamide, that unclogs pores, refines texture, and calms acne-prone skin within 2 weeks.

Active & Key Ingredients
Salicylic Acid (BHA, ~1.5%) – Oil-soluble exfoliant that penetrates pores to clear acne and reduces inflammation
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Glycolic Acid (AHA, ~3.5%) – Promotes surface exfoliation, improves tone, and defades signs of early aging

Lipo-hydroxy Acid (LHA, ~0.45%) – Micro-exfoliant refining texture and minimizing pores
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Niacinamide (~2–3%) – Anti-inflammatory, barrier-supporting humectant that brightens skin
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Thermal Spring Water – Soothes and reduces sensitivity
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Supporting humectants like Biosaccharide Gum-1 soften and moisturize the skin.
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Mode of Action
Multi-acid exfoliation: BHAs dissolve pore blockages; AHAs refine texture; LHA smooths surface gently.

Sebum and blemish control: Salicylic acid and niacinamide reduce oil and inflammation.

Barrier support & hydration: Thermal water and niacinamide soothe and strengthen.

Early anti-ageing: Exfoliation smooths fine lines, visible over time.
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Uses & Indications
Evening serum for adult acne-prone or combination skin

Targets: Pores, blackheads, inflammatory and non-inflammatory blemishes, post-acne marks, texture irregularities, early-age fine lines

Suitable for sensitive skin, tested with dermatologists
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Evening use after gentle cleansing.

Apply 2–3 drops to face, avoiding eye area.

Beginners: Use every other day; progress to nightly as tolerated.

Always follow with moisturizer; use SPF 15+ during day.
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Safety & Side Effects
Dermatologist-tested, non-comedogenic, fragrance added, alcohol-based
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Initial mild tingling or dryness due to exfoliation is normal.

Overuse can cause irritation—reduce frequency or combine with hydrating layers.
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Warnings & Cautions
External use only

Avoid application on broken or peeling skin

Sun sensitivity: Mandatory SPF during daytime

Not recommended for children under 12

Patch test if very sensitive

Drug Classification
OTC cosmeceutical serum

Classified as an exfoliating and anti-blemish treatment

Drug Interactions
Minimal systemic absorption – low interaction risk

Avoid combining with other exfoliants (retinoids, benzoyl peroxide) without professional guidance

Clinical and User Evidence
Consumer test (n=99, 2 weeks):

83% reported more even tone

82% saw overall improvement

80% noted refined texture
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Clinical data (n=51) over 4 weeks:

45% fewer pimples

50% fewer blackheads

49% fewer post-acne marks

90% reported visible smoother skin
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Verified user reviews highlight reduced cleareance, smoother, clearer skin, and no irritation

FAQ (Q&A Format)
Q: How soon will I see changes?
A: Many users see smoother texture and calmer skin in as little as 2 weeks; significant results in 4 weeks.

Q: Is it suitable for sensitive skin?
A: Yes—formulated with soothing agents and tested under dermatological control.
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Q: Can I use it daily with moisturizer?
A: Yes—start every other night, then increase to nightly as tolerated; always moisturize and use daytime SPF.

Q: Can I use other actives like retinoids?
A: It may be too strong combined with retinoids—rotate use or consult a skin specialist.

Q: Is fragrance suitable for acne skin?
A: It may irritate some; fragrance-sensitive users should patch test or explore fragrance-free alternatives.

La Roche‑Posay Effaclar Ultra Concentrate Serum, acne serum 30 ml, salicylic glycolic LHA serum, niacinamide exfoliating serum, EZ Chemist acne-prone serum