Side-by-side comparison

Haruharu Wonder Black Rice Hyaluronic Serum vs La Roche-Posay Hyalu B5 Hyaluronic Acid Serum

Both are serums. They share a 66% active-ingredient overlap, so the real decision is about price, texture and the supporting ingredients. Here's the side-by-side.

66%Active overlap
Haruharu Wonder
Black Rice Hyaluronic Serum
SerumBudgetMorning or evening
DullnessDrynessDamaged Barrier

Fermented black rice extract with niacinamide and hyaluronic acid. Antioxidant-leaning hydrator rather than a targeted active — a good 'daily vegetable' layer under stronger serums.

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La Roche-Posay
Hyalu B5 Hyaluronic Acid Serum
SerumMid-rangeMorning or evening
DrynessDamaged Barrier

Two molecular weights of hyaluronic acid with panthenol and madecassoside. Designed for visible fine-line plumping on dehydrated skin — works best on damp skin sealed with moisturiser. Fragrance-free.

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The verdict

Which should you choose?

On price, the Haruharu Wonder Black Rice Hyaluronic Serum sits in the Budget tier versus Mid-range for the La Roche-Posay — so it's the more budget-led pick if the overlap is what you're after. The Haruharu Wonder leans toward Dullness.

The overlap

What they share

At 66% active overlap, these are the ingredients doing comparable work in both formulas:

Hyaluronic Acid
The formulation

Ingredient stacks, side by side

Haruharu Wonder — top of the list

  • Oryza Sativa (…~50–80%
  • Water~5–25%
  • Butylene Glycol~3–10%
  • Niacinamide~2–6%
  • Bambusa Vulgar…~1.5–4%
  • Dipropylene Gl…~1–2%
  • Glycerin~1–2%
  • 1,2-Hexanediol~1–2%
  • Sodium Hyaluro…~1–2%
  • Hyaluronic Acid~1–2%

La Roche-Posay — top of the list

  • Aqua / Water~50–80%
  • Glycerin~5–25%
  • Propanediol~3–10%
  • Sodium Hyaluro…~2–6%
  • Hyaluronic Acid~1.5–4%
  • Panthenol~1–2%
  • Madecassoside~1–2%
  • Tromethamine~1–2%
  • Propylene Glycol~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

Haruharu WonderLa Roche-Posay
CategorySerumSerum
Price tierBudgetMid-range
Best forDullness, Dryness, Damaged BarrierDryness, Damaged Barrier
Usage notesMorning or eveningMorning or evening
Active overlap66% — Hyaluronic Acid
Questions

Common questions

Is the Haruharu Wonder Black Rice Hyaluronic Serum or the La Roche-Posay Hyalu B5 Hyaluronic Acid Serum better?
Neither is universally better — they share 66% active-ingredient overlap, so for the actives that drive results they're close. The Haruharu Wonder Black Rice Hyaluronic Serum is the more budget-friendly option, while the other may differ on texture, finish and supporting ingredients. Pick based on your skin's priorities rather than a single 'winner'.
What's the difference between the Haruharu Wonder Black Rice Hyaluronic Serum and the La Roche-Posay Hyalu B5 Hyaluronic Acid Serum?
Both are serums that share Hyaluronic Acid. Where they differ: they sit in different price tiers (Budget vs Mid-range); the Haruharu Wonder targets Dullness.
Are the Haruharu Wonder Black Rice Hyaluronic Serum and La Roche-Posay Hyalu B5 Hyaluronic Acid Serum dupes for each other?
They share 66% 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 Haruharu Wonder Black Rice Hyaluronic Serum and La Roche-Posay Hyalu B5 Hyaluronic Acid Serum 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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85% overlap

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