Quick answer: the COSRX Centella Blemish Cream comes closest to the La Roche-Posay Effaclar Duo+: it shares Niacinamide, but not Salicylic Acid. On price, both sit in the Mid-range tier. It also overlaps with 3 other products below.
Products the Centella Blemish Cream matches
La Roche-Posay
1 of 2
hero actives matched
Same price tierNiacinamide
Why it holds up: Shares Niacinamide, but not the original's Salicylic Acid.
Full ingredient analysis →See them side by side →Biodance
1 of 3
hero actives matched
Pricier originalNiacinamide
Why it holds up: Shares Niacinamide, but not the original's Collagen.
Full ingredient analysis →See them side by side →Medicube
1 of 3
hero actives matched
Pricier originalNiacinamide
Why it holds up: Shares Niacinamide, but not the original's Collagen and Peptides.
Full ingredient analysis →See them side by side →Tower 28
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no hero actives to match
Pricier original
Why it holds up: The original doesn't list hero actives, so this is a same-category alternative rather than an ingredient match.
Full ingredient analysis →See them side by side →Common questions
Is the COSRX Centella Blemish Cream a real dupe?
It shares hero actives with 4 same-category products in our catalogue, most closely the La Roche-Posay Effaclar Duo+ (matching 1 of 2 of its hero actives). "Dupe" here means shared key ingredients, not an identical formula.
Does matching more hero actives make it better?
No. The match count only shows how many hero actives are shared. The base, supporting ingredients, texture and price still differ, so use the side-by-side comparison for the full picture.
Educational information only — not medical advice. Overlap reflects shared hero actives, not clinical equivalence.