Verdict: La Roche-Posay Hyalu B5 Hydrating Serum ($45) is a 72% match dupe for LA MER The Concentrate ($370) — 88% cheaper for a comparable formula. Full price and ingredient comparison below.
By the BeautyFlow Research Team · Updated July 2026
The Original
The Concentrate
$370The Dupe
Save 88%Hyalu B5 Hydrating Serum
$45Curated by BeautyFlow editors
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Ingredient Comparison
Ingredient data coming soon
Ingredient data coming soon
Frequently Asked Questions
Is La Roche-Posay Hyalu B5 Hydrating Serum a good dupe for LA MER The Concentrate?
Yes — La Roche-Posay Hyalu B5 Hydrating Serum is a 72% match for LA MER The Concentrate based on ingredient and formula comparison, at 88% less ($45 vs $370).
How much cheaper is La Roche-Posay Hyalu B5 Hydrating Serum than LA MER The Concentrate?
La Roche-Posay Hyalu B5 Hydrating Serum costs $45 versus $370 for LA MER The Concentrate — a saving of $325 (88% less).
What is the difference between LA MER The Concentrate and La Roche-Posay Hyalu B5 Hydrating Serum?
The main difference is price — LA MER The Concentrate costs $325 more. Formulas are closely matched in our comparison, though packaging and shade ranges may differ. See the full ingredient table on this page for the exact overlap.
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