Side-by-side comparison

The Ordinary Hyaluronic Acid 2% + B5 vs The Ordinary Marine Hyaluronics

Both are serums. They share a 70% active-ingredient overlap, so the real decision is about price, texture and the supporting ingredients. Here's the side-by-side.

70%Active overlap
The Ordinary
Hyaluronic Acid 2% + B5
SerumBudgetMorning or evening
DrynessDamaged Barrier

A water-based humectant serum combining three molecular weights of hyaluronic acid with a crosspolymer and panthenol. Surface and deeper-layer hydration in one step. Apply to damp skin and seal with moisturiser — on bare dry skin, HA can pull water outward and make things worse.

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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?

Both sit in the Budget tier, so cost isn't the deciding factor here — choose on texture, finish and the supporting ingredients. The The Ordinary leans toward Damaged Barrier, Dryness. The The Ordinary leans toward Dehydration, Dullness, Oiliness.

The overlap

What they share

At 70% active overlap, these are the ingredients doing comparable work in both formulas:

Hyaluronic Acid
The formulation

Ingredient stacks, side by side

The Ordinary — top of the list

  • Aqua (Water)~50–80%
  • Sodium Hyaluro…~5–25%
  • Sodium Hyaluro…~3–10%
  • Hyaluronic Acid2%
  • Panthenol~1.5–4%
  • Pentylene Glycol~1–2%
  • Propanediol~1–2%

The Ordinary — 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 OrdinaryThe Ordinary
CategorySerumSerum
Price tierBudgetBudget
Best forDryness, Damaged BarrierDehydration, Oiliness, Dullness
Usage notesMorning or eveningMorning or evening
Active overlap70% — Hyaluronic Acid
Questions

Common questions

Is the The Ordinary Hyaluronic Acid 2% + B5 or the The Ordinary Marine Hyaluronics better?
Neither is clearly better — they overlap 70% on active ingredients and sit in the same price tier. The difference comes down to texture, finish and the supporting ingredients, so the right choice depends on your skin type and preferences.
What's the difference between the The Ordinary Hyaluronic Acid 2% + B5 and the The Ordinary Marine Hyaluronics?
Both are serums that share Hyaluronic Acid. Where they differ: the The Ordinary targets Damaged Barrier, Dryness; the The Ordinary targets Dehydration, Dullness.
Are the The Ordinary Hyaluronic Acid 2% + B5 and The Ordinary Marine Hyaluronics dupes for each other?
They share 70% active-ingredient overlap based on published INCI lists, so one can stand in for the other on the actives that matter — chiefly Hyaluronic Acid. A dupe matches the hero actives, not the full sensory experience, so expect differences in texture, fragrance and exact concentrations.
Can I use the The Ordinary Hyaluronic Acid 2% + B5 and The Ordinary Marine Hyaluronics together?
They both fill the serum slot in a routine, so you'd normally pick one rather than layer both. If you want to use both, treat one as your daytime option and the other for evening, and patch-test when introducing anything new.
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70% overlap

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