Quick answer: the closest dupe for the The Ordinary Amino Acids + B5 is the The Inkey List Hyaluronic Acid Serum — 70% active overlap, sharing Panthenol. Similar price, so compare on the base, supporting actives and texture rather than cost. Note the original also carries Amino Acids.
The contextWhy look for a Amino Acids + B5 dupe?
A hydrating serum of skin-identical amino acids with provitamin B5 for comfort and surface hydration. A gentle, fragrance-free hydrator that supports a healthy-feeling barrier; pairs well under richer creams.
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 Amino Acids, Panthenol. The alternatives below share that profile; where they differ is in texture, supporting ingredients and finish.
The matchesClosest alternatives
★ Closest matchBudgetPanthenol
Why it works: Built on the same hero actives — Panthenol — which is what drives results in a serum.
What's different: Similar price, so compare on the base, supporting actives and texture rather than cost. Note the original also carries Amino Acids.
Full ingredient analysis → BudgetPanthenol
Why it works: Built on the same hero actives — Panthenol — which is what drives results in a serum.
What's different: Similar price, so compare on the base, supporting actives and texture rather than cost. Note the original also carries Amino Acids.
Full ingredient analysis →BudgetPanthenol
Why it works: Built on the same hero actives — Panthenol — which is what drives results in a serum.
What's different: Similar price, so compare on the base, supporting actives and texture rather than cost. Note the original also carries Amino Acids.
Full ingredient analysis →Common questions
What is the best dupe for the The Ordinary Amino Acids + B5?
The closest alternative in our catalogue is the The Inkey List Hyaluronic Acid Serum, which shares Panthenol and scores 70% on active-ingredient overlap. Similar price, so compare on the base, supporting actives and texture rather than cost. Note the original also carries Amino Acids.
Are Amino Acids + B5 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 Amino Acids + B5 dupes?
We match products in the same category (serum) that share hero actives (Amino Acids, Panthenol), then rank by overlap and price. Matches are based on published INCI lists, not lab assays.
Compare them yourself
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.