Quick answer: the closest match for the La Roche-Posay Hyalu B5 Hyaluronic Acid Serum is The Inkey List Hyaluronic Acid Serum: it shares Hyaluronic Acid and Panthenol, but not Centella Asiatica. Cheaper: Budget versus Mid-range for the original.
The contextWhy look for a Hyalu B5 Hyaluronic Acid Serum dupe?
Two molecular weights of hyaluronic acid with panthenol and madecassoside. Designed for visible fine-line plumping on dehydrated skin — works best on damp skin sealed with moisturiser. Fragrance-free.
A good dupe isn't about a matching label — it's about matching the hero actives, the ingredients carrying the real work. For this serum that means Hyaluronic Acid, Panthenol, Centella Asiatica. The alternatives below are ranked by how many of those they match, then by price.
The matchesClosest alternatives
★ Closest match2 of 3
hero actives matched
BudgetHyaluronic AcidPanthenol
Why it works: Shares Hyaluronic Acid and Panthenol, but not Centella Asiatica.
What's different: Cheaper: Budget versus Mid-range for the original.
Full ingredient analysis → 2 of 3
hero actives matched
BudgetHyaluronic AcidPanthenol
Why it works: Shares Hyaluronic Acid and Panthenol, but not Centella Asiatica.
What's different: Cheaper: Budget versus Mid-range for the original.
Full ingredient analysis →2 of 3
hero actives matched
BudgetHyaluronic AcidPanthenol
Why it works: Shares Hyaluronic Acid and Panthenol, but not Centella Asiatica.
What's different: Cheaper: Budget versus Mid-range for the original. It also adds Niacinamide.
Full ingredient analysis →1 of 3
hero actives matched
BudgetHyaluronic Acid
Why it works: Shares Hyaluronic Acid, but not Panthenol and Centella Asiatica.
What's different: Cheaper: Budget versus Mid-range for the original. It also adds Niacinamide.
Full ingredient analysis →1 of 3
hero actives matched
BudgetCentella Asiatica
Why it works: Shares Centella Asiatica, but not Hyaluronic Acid and Panthenol.
What's different: Cheaper: Budget versus Mid-range for the original.
Full ingredient analysis →1 of 3
hero actives matched
Mid-rangeHyaluronic Acid
Why it works: Shares Hyaluronic Acid, but not Panthenol and Centella Asiatica.
What's different: Same price tier (Mid-range), so this is an alternative rather than a saving.
Full ingredient analysis →Common questions
What is the best dupe for the La Roche-Posay Hyalu B5 Hyaluronic Acid Serum?
The closest match for the La Roche-Posay Hyalu B5 Hyaluronic Acid Serum is The Inkey List Hyaluronic Acid Serum: it shares Hyaluronic Acid and Panthenol, but not Centella Asiatica. Cheaper: Budget versus Mid-range for the original.
Are Hyalu B5 Hyaluronic Acid Serum dupes really as good as the original?
A dupe matches the hero actives — the ingredients doing the measurable work — but rarely the full sensory experience. Texture, fragrance, supporting ingredients and exact concentrations differ, so treat a dupe as a value-led alternative rather than an identical copy.
How does Skin Stacker choose Hyalu B5 Hyaluronic Acid Serum dupes?
We look at products in the same category (serum) that share at least one of its hero actives (Hyaluronic Acid, Panthenol and Centella Asiatica), rank them by how many of its key treatment actives they match, then by price. Matches are based on published ingredient lists, not lab testing.
Compare them yourself
Head-to-headCompare this with…
Same-category picks that share at least one hero active — see ingredients, price and who each suits, side by side.
Browse every comparison →Skin Stacker is independent and receives no payment from any brand. "Dupe" matches are based on publicly disclosed INCI lists and shared hero actives — not on side-by-side lab testing. A shared active profile does not guarantee an identical experience: texture, fragrance, supporting ingredients and concentrations all differ. Formulations change — always re-check the current label before buying.