Side-by-side comparison

The Inkey List Niacinamide Serum vs The Ordinary Marine Hyaluronics

Both serums contain Hyaluronic Acid, but only The Inkey List Niacinamide Serum adds a targeted active: Niacinamide. That's the main thing to weigh.

1Shared hero active
The Inkey List
Niacinamide Serum
SerumBudgetMorning or evening
OilinessCongestionDark Spots

A 10% niacinamide serum with added hyaluronic acid for oil control and blemish support. A clean, affordable single-active option; broadly comparable to other 10% niacinamide serums with a slightly more hydrating base.

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The Ordinary
Marine Hyaluronics
SerumBudgetMorning or evening
DehydrationOilinessDullness

An ultra-light hydrating serum using marine-derived humectants instead of classic hyaluronic acid, for a weightless, almost water-like feel. A good layering hydrator for oily skin that finds HA serums tacky.

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The verdict

Which should you choose?

The Inkey List Niacinamide Serum goes further with Niacinamide, which The Ordinary Marine Hyaluronics doesn't have. If you only need Hyaluronic Acid, The Ordinary Marine Hyaluronics covers it; if you want Niacinamide as well, choose The Inkey List Niacinamide Serum. The Inkey List Niacinamide Serum is the better fit for congestion and dark spots; The Ordinary Marine Hyaluronics for dehydration and dullness. 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

The Inkey List Niacinamide Serum — top of the list

  • Aqua~50–80%
  • Niacinamide~5–25%
  • Glycerin~3–10%
  • Sodium Hyaluron…~2–6%
  • Pentylene Glycol~1.5–4%

The Ordinary Marine Hyaluronics — top of the list

  • Aqua~50–80%
  • Glycerin~5–25%
  • Propanediol~3–10%
  • Amino Esters-1~2–6%
  • Sodium Hyaluron…~1.5–4%

● 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

The Inkey List Niacinamide SerumThe Ordinary Marine Hyaluronics
CategorySerumSerum
Price tierBudgetBudget
Best forOiliness, Congestion, Dark SpotsDehydration, Oiliness, Dullness
Usage notesMorning or eveningMorning or evening
Shared hero activesHyaluronic Acid
Questions

Common questions

Is The Inkey List Niacinamide Serum or The Ordinary Marine Hyaluronics better?
It depends on whether you want Niacinamide. The Inkey List Niacinamide Serum has it; The Ordinary Marine Hyaluronics doesn't. Otherwise both rely on Hyaluronic Acid.
What's the difference between The Inkey List Niacinamide Serum and The Ordinary Marine Hyaluronics?
The Inkey List Niacinamide Serum's hero actives are Niacinamide and Hyaluronic Acid. The Ordinary Marine Hyaluronics's are Marine Humectants and Hyaluronic Acid.
Are The Inkey List Niacinamide Serum and The Ordinary Marine Hyaluronics dupes for each other?
Only partly. They share Hyaluronic Acid, but The Inkey List Niacinamide Serum's Niacinamide has no counterpart in The Ordinary Marine Hyaluronics.
Can I use The Inkey List Niacinamide Serum and The Ordinary Marine Hyaluronics together?
Usually, yes. Apply the thinner texture first, then the thicker one, and patch-test when introducing anything new.
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