Quick answer: The Inkey List Polyglutamic Acid Serum comes closest to the Vichy Minéral 89 Hyaluronic Acid Booster: it shares all of its hero actives (Hyaluronic Acid). On price, The Inkey List Polyglutamic Acid Serum is the cheaper of the two (Budget versus Mid-range). It also overlaps with 5 other products below.
Products the Polyglutamic Acid Serum matches
1 of 1
hero active matched
Pricier originalHyaluronic Acid
Why it holds up: Shares all of the original's hero actives: Hyaluronic Acid.
Full ingredient analysis →See them side by side →The Inkey List
1 of 2
hero actives matched
Same price tierHyaluronic Acid
Why it holds up: Shares Hyaluronic Acid, but not Panthenol.
Full ingredient analysis →See them side by side →The Ordinary
1 of 2
hero actives matched
Same price tierHyaluronic Acid
Why it holds up: Shares Hyaluronic Acid, but not Panthenol.
Full ingredient analysis →See them side by side →The Ordinary
1 of 2
hero actives matched
Same price tierHyaluronic Acid
Why it holds up: Shares Hyaluronic Acid, but not Marine Humectants.
Full ingredient analysis →See them side by side →Neutrogena
1 of 2
hero actives matched
Same price tierHyaluronic Acid
The catch: Only shares supporting ingredients (Hyaluronic Acid). It doesn't contain the original's Retinol, so it won't do the same job.
Full ingredient analysis →See them side by side →1 of 3
hero actives matched
Same price tierHyaluronic Acid
The catch: Only shares supporting ingredients (Hyaluronic Acid). It doesn't contain the original's Vitamin C, so it won't do the same job.
Full ingredient analysis →See them side by side →Common questions
Is The Inkey List Polyglutamic Acid Serum a real dupe?
It shares hero actives with 6 same-category products in our catalogue, most closely the Vichy Minéral 89 Hyaluronic Acid Booster (matching 1 of 1 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.