Side-by-side comparison

The Inkey List Hyaluronic Acid Serum vs The Inkey List Polyglutamic Acid Serum

Neither serum relies on a targeted treatment active; both are about comfort and skin support. They share Hyaluronic Acid, so texture, price and the rest of the formula decide it.

1Shared hero active
The Inkey List
Hyaluronic Acid Serum
SerumBudgetMorning or evening
DehydrationDrynessDullness

A multi-weight hyaluronic acid serum with vitamin B5 for layered hydration. A no-frills, affordable HA serum; apply to damp skin and seal with moisturiser to avoid the dryness HA can cause in low humidity.

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The Inkey List
Polyglutamic Acid Serum
SerumBudgetMorning or evening
DehydrationDullnessDryness

A hydration serum using polyglutamic acid, which holds even more water than hyaluronic acid, layered with HA. A lightweight, plumping hydrator that works well over or under HA; an affordable way to trial the ingredient.

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The verdict

Which should you choose?

Both lean on Hyaluronic Acid for hydration and support. Hyaluronic Acid Serum adds Panthenol. Polyglutamic Acid Serum adds Polyglutamic Acid. Both sit in the Budget price tier.

The overlap

What they share

This hero active appears in both formulas:

Hyaluronic Acid
The formulation

Ingredient stacks, side by side

Hyaluronic Acid Serum — top of the list

  • Aqua~50–80%
  • Glycerin~5–25%
  • Sodium Hyaluron…~3–10%
  • Hydrolyzed Hyal…~2–6%
  • Sodium Hyaluron…~1.5–4%
  • Panthenol~1–2%

Polyglutamic Acid Serum — top of the list

  • Aqua~50–80%
  • Glycerin~5–25%
  • Polyglutamic Ac…~3–10%
  • Sodium Hyaluron…~2–6%
  • Propanediol~1.5–4%
  • Panthenol~1–2%

● marks ingredients that appear near the top of both lists. Percentages are positional estimates from INCI order, not disclosed doses.

At a glance

The specs

Hyaluronic Acid SerumPolyglutamic Acid Serum
CategorySerumSerum
Price tierBudgetBudget
Best forDehydration, Dryness, DullnessDehydration, Dullness, Dryness
Usage notesMorning or eveningMorning or evening
Shared hero activesHyaluronic Acid
Questions

Common questions

Is The Inkey List Hyaluronic Acid Serum or The Inkey List Polyglutamic Acid Serum better?
Neither is a treatment product, so it comes down to feel and fit. Both use Hyaluronic Acid; pick on price, texture and the concerns each suits.
What's the difference between The Inkey List Hyaluronic Acid Serum and The Inkey List Polyglutamic Acid Serum?
Hyaluronic Acid Serum's hero actives are Hyaluronic Acid and Panthenol. Polyglutamic Acid Serum's are Polyglutamic Acid and Hyaluronic Acid.
Are The Inkey List Hyaluronic Acid Serum and The Inkey List Polyglutamic Acid Serum dupes for each other?
They're similar in role: both rely on Hyaluronic Acid for support rather than a targeted active. Texture and the rest of the formula will still feel different.
Can I use The Inkey List Hyaluronic Acid Serum and The Inkey List Polyglutamic Acid Serum together?
Usually, yes. Apply the thinner texture first, then the thicker one, and patch-test when introducing anything new.
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1 shared hero active

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