Verified Beauty Data

Dupe report Nº 022 / Alpha arbutin 2% serums

COSRX Alpha-Arbutin 2% dupes, ranked by formula match

It's 2% alpha arbutin. The Ordinary discloses the exact same number for less than half the price.

Some links earn us a commission. It never changes the verdict — the methodology is public.

02 / The scoreboard

2 formulas, one number that matter

Read the actives column first — it is the apples-to-apples comparison. $ per gram of active is what the working ingredients cost you; the base-formula score is supporting evidence, not the verdict.

Product Actives vs original $ / g of active Price Base formula Verdict
COSRX The Alpha-Arbutin 2 Discoloration Care Serum Concentration disclosed (2% alpha arbutin) $25.01 $25.00 50 mL 100% the reference The original
Exact disclosed active the direct clones — same actives, same percentages
The Ordinary Alpha Arbutin 2% + Hyaluronic Acid for Hyperpigmentation Concentration disclosed (2% alpha arbutin) $19.44 $11.50 30 mL 84% highest measured The winner Amazon →

✓ same % as original ≠ different % ? in formula, % undisclosed — not in formula

03 / The original

Why the original is the original

COSRX's The Alpha-Arbutin 2% Discoloration Care Serum leads with 2% alpha arbutin — the brightening active that fades dark spots and post-acne marks by inhibiting tyrosinase — but it doesn't stop there. This is a loaded brightening serum: niacinamide and tranexamic acid actually sit above the arbutin on the INCI, with glutathione, acetyl glucosamine, ferulic acid, licorice and several hyaluronic-acid forms layered in. The arbutin is the headline, but the formula is a full discoloration stack.

Here's the thing: 2% alpha arbutin is a disclosed, commodity concentration. COSRX prints the number in the product name, and so does the most famous budget skincare line in the world. On the active doing the headline work, the two are identical — so the premium isn't buying you a stronger or better dose of arbutin.

So this page is honest in both directions. The Ordinary Alpha Arbutin 2% + HA discloses the exact same 2% alpha arbutin for about $11.50 versus $25. If pure alpha arbutin is what you want, that's the value pick. But COSRX is not a marked-up copy — its higher price buys a genuinely fuller brightening serum (niacinamide, tranexamic acid, glutathione and more) in a larger 50 mL bottle, so per gram of actual arbutin the gap narrows. The real question is whether you want a single-active arbutin serum or a multi-active brightening one.

04 / The candidates

Every candidate, examined

01 / The Ordinary

The winner
$19.44 per g of active
$11.50 retail · 30 mL
84% base formula · highest of 6

The Ordinary Alpha Arbutin 2% + Hyaluronic Acid for Hyperpigmentation

Shared formula DNA 2 of 39 original ingredients present
Water Propanediol Glycerin Niacinamide Tranexamic Acid Acetyl Glucosamine Alpha-Arbutin 1 2-Hexanediol Dimethicone Dimethyl Isosorbide Diethoxyethyl Succinate Butylene Glycol Citric Acid Alcohol Sodium Polyacryloyldimethyl Taurate Hydrogenated Lecithin Xanthan Gum Sodium Metabisulfite Disodium Edta Ethylhexylglycerin Dextrin Theobroma Cacao (Cocoa) Extract Sodium Citrate Madecassoside Sodium Methyl Stearoyl Taurate Sodium Hyaluronate Tocopherol Hydrolyzed Hyaluronic Acid Sodium Hyaluronate Crosspolymer Hyaluronic Acid Ferulic Acid Glycyrrhiza Glabra (Licorice) Root Extract Panthenol Arginine Methyl Trimethicone Allantoin Glutathione Sodium Acetylated Hyaluronate

shared with original not shared rare marker — weighs more in the score

What matches
Discloses the identical 2% alpha arbutin — the same hero concentration as the original, here as the second ingredient on the INCI — paired with hyaluronic acid. Alpha arbutin is the shared active doing the brightening work: fading dark spots and post-acne marks by inhibiting tyrosinase. At $11.50 versus $25, the cheapest sticker for a disclosed 2% arbutin serum.
What differs
A deliberately single-purpose formula. Where COSRX surrounds its 2% arbutin with a full brightening stack — niacinamide and tranexamic acid (both above the arbutin on its INCI), plus glutathione, acetyl glucosamine, ferulic acid and licorice — The Ordinary is just 2% alpha arbutin and hyaluronic acid, in a smaller 29.5735 mL bottle. Same hero active, far leaner supporting cast.
Who it's for
The winner — the pick if you want the original's exact 2% alpha arbutin at the lowest price ($11.50 versus $25). If you want a full multi-active brightening serum, COSRX earns its premium with real extra actives and a bigger bottle; if pure alpha arbutin is the point, this is it.
Ships in
Packaging not verified No brand or retailer statement on the bottle — we won’t guess.
pH
pH not published L-ascorbic acid needs pH below 3.5 to absorb
Data source
Concentration disclosed (2% alpha arbutin) 2% alpha arbutin disclosed by brand (stated on product name); INCI verified verbatim (INCIDecoder); ASIN B06XCZFCFZ price PA-API-verified. Pulled from the verifiedbeautydata products.json verified record.

$11.50 for 30 mL → $19.44 per gram of active — 1.3× cheaper per active gram than the original's $25.01.

Buy on Amazon $11.50

05 / Methodology

How we verified this

Verified 2026-06-15

Every formula on this page was tokenized — split into its individual INCI ingredients — and matched against the EU CosIng ingredient database, so "Aqua," "Water," and "Eau" all resolve to the same ingredient.

The base-formula match score works like this: sharing a rare ingredient counts far more than sharing a common one. Almost every serum contains water and glycerin — that proves nothing. Almost nothing contains Ethoxydiglycol or Laureth-23, so when a candidate shares those with the original, it says something real about how the formula was built. (For the statisticians: it is an IDF-weighted Jaccard similarity over the normalized ingredient lists.)

Scores are computed, not opinions. The verdict tags are our editorial read of the actives, the scores, and the prices — and the methodology stays public so you can disagree with us precisely.

Where the ingredient lists come from

  1. Concentration disclosed (2% alpha arbutin)

Sources for this report

  • INCIDecoder product pages (INCI verified verbatim)
  • Brand product pages / product names — disclosed 2% alpha arbutin concentration
  • Amazon Creators PA-API — ASIN/price verification
  • verifiedbeautydata products.json verified records (alpha-arbutin.json ingredient dossier)

06 / Questions

Frequently asked

What is the best COSRX Alpha-Arbutin 2% dupe?
The Ordinary Alpha Arbutin 2% + HA ($11.50) is the closest match on the active. It discloses the identical 2% alpha arbutin — the same hero ingredient, second on its INCI — for less than half the $25 price. The difference is what surrounds it: COSRX adds a full brightening stack (niacinamide, tranexamic acid, glutathione, ferulic acid, licorice) in a bigger 50 mL bottle, while The Ordinary keeps it to 2% arbutin plus hyaluronic acid. Same hero active, leaner (and cheaper) formula.
Is The Ordinary Alpha Arbutin the same as COSRX?
On the headline active, yes — both disclose 2% alpha arbutin, the ingredient fading dark spots and post-acne marks by inhibiting tyrosinase. The formulas are not identical: The Ordinary is a single-active serum (2% arbutin + hyaluronic acid), while COSRX layers in niacinamide and tranexamic acid (both above the arbutin on its INCI), plus glutathione, acetyl glucosamine and licorice. If you just want 2% alpha arbutin, they're interchangeable; if you want a multi-active brightening serum, COSRX is the fuller formula.
Why is COSRX alpha arbutin more expensive?
Partly the bigger bottle, partly the formula. 2% alpha arbutin is a disclosed, commodity concentration — both brands print the number, so you're not paying for a stronger dose. COSRX's higher price buys a larger 50 mL bottle and a genuinely fuller brightening serum (niacinamide, tranexamic acid, glutathione and more), so per gram of arbutin the gap narrows to roughly $25.01/g versus The Ordinary's $19.44/g. For pure alpha arbutin at the lowest sticker, The Ordinary wins at $11.50 versus $25.

→ / Related

Dig into the ingredients