What is the best Paula's Choice Discoloration Repair Serum dupe?

Naturium Tranexamic Topical Acid 5% ($19.99) discloses a HIGHER 5% tranexamic acid than Paula's Choice's own disclosed 3% — the shared headline active, confirmed stronger, not diluted — for well under half the price.

Does Paula's Choice Discoloration Repair Serum disclose its ingredient percentages?

Yes — 3% tranexamic acid, 5% niacinamide, and 0.5% bakuchiol, disclosed directly in Paula's Choice's own marketing copy and independently confirmed across two retailer mirrors of the brand's product page.

Does Naturium's tranexamic acid serum replace the bakuchiol in Paula's Choice's formula?

No. Bakuchiol does not appear in Naturium's ingredient list at all — it has no counterpart on the dupe side. If bakuchiol is specifically why you want the original, no cheaper product here replicates it. If Naturium is ever unavailable, The INKEY List's Tranexamic Acid Hyperpigmentation Serum is a weaker fallback that doesn't disclose a percentage.

Dupe report Nº 039 / Tranexamic acid + niacinamide brightening serums

Paula's Choice Discoloration Repair Serum dupes, ranked by formula match

Naturium discloses a HIGHER 5% tranexamic acid than Paula's Choice's own 3% — but there's no bakuchiol on the dupe side.

The verdict / read the actives, not the marketing

There is no exact Paula's Choice CLINICAL Discoloration Repair Serum dupe. Correcting an earlier assumption: Paula's Choice does disclose numbers for this serum, in its own marketing copy — 3% tranexamic acid, 5% niacinamide, 0.5% bakuchiol, independently confirmed across two retailer mirrors of the brand's own product page. Naturium's Tranexamic Topical Acid 5% discloses a HIGHER concentration of the shared headline active — 5% tranexamic acid versus Paula's Choice's 3% — for well under half the price. Niacinamide is present on both sides too, though Naturium doesn't disclose its percentage and lists it further down the INCI (7th of 22, versus Paula's Choice's 2nd of ~22). What Naturium does not replicate at all is bakuchiol — Paula's Choice's third active has no counterpart in Naturium's formula. This is real overlap on two of three actives, with the disclosed active actually running stronger on the cheaper product — not a diluted copy — but it is not a full match, and bakuchiol is simply absent on the dupe side.

3 % ✓ original Tranexamic Acid

5 % ✓ original Niacinamide

0.5 % ✓ original Bakuchiol

$19.99 vs $55 original Naturium

Best available match: 63% base-formula score — the highest we measured across the candidates. Scores reflect formula proximity — read the actives column for the clinical story. How we score ↓

The winner

Naturium Tranexamic Topical Acid 5%

Discloses a HIGHER 5% tranexamic acid than the original's disclosed 3% — the shared headline active, confirmed stronger, not diluted. Niacinamide is present in both. At $19.99 versus $55, well under half the price. Honest caveat: niacinamide's own percentage is undisclosed here and sits lower on the INCI, and there is no bakuchiol at all — the original's third active has no counterpart in this formula.

Currently unavailable on Amazon Breakdown ↓

The stronger pick — experienced users

Naturium Tranexamic Topical Acid 5%

5% Tranexamic Acid vs the original's 3% — more potent, can be more irritating. Know your skin first.

Currently unavailable on Amazon Breakdown ↓

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

02 / The scoreboard

2 formulas, three numbers 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
Paula's Choice CLINICAL Discoloration Repair Serum	Concentrations disclosed by brand	— not disclosed	$55.00 30 mL · Amazon	100% the reference	The original
Partial overlap missing actives — different formula wearing the keywords
Naturium Tranexamic Topical Acid 5%	Concentration disclosed in product name	— not disclosed	$19.99 30 mL · Amazon	63% highest measured	The winner currently unavailable

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

03 / The original

Why the original is the original

Discoloration Repair Serum is a three-active brightening formula: 3% tranexamic acid, 5% niacinamide, and 0.5% bakuchiol, all disclosed directly in Paula's Choice's own marketing copy (confirmed independently across two retailer mirrors of the brand's product page). Niacinamide sits 2nd on the INCI, tranexamic acid 4th.

Naturium's Tranexamic Topical Acid 5% discloses a HIGHER concentration of the shared headline active — 5% tranexamic acid versus Paula's Choice's 3% — for well under half the price. Niacinamide is present in Naturium's formula too, though Naturium doesn't disclose its percentage and lists it further down the ingredient list (7th of 22, versus Paula's Choice's 2nd).

What Naturium does not replicate at all is bakuchiol — Paula's Choice's third active simply has no counterpart in Naturium's formula. So this is real, and stronger-not-weaker, overlap on the disclosed headline active, partial overlap on niacinamide, and a genuine gap on the third ingredient. If bakuchiol is the reason you're considering Paula's Choice, no cheaper product here replicates it. (If Naturium is ever unavailable, The INKEY List's Tranexamic Acid Hyperpigmentation Serum is a real but weaker fallback — it doesn't disclose a percentage and sits at a less prominent ingredient position.)

04 / The candidates

Every candidate, examined

01 / Naturium

The winner

Naturium Tranexamic Topical Acid 5% bottle

— per g of active

$19.99 retail · 30 mL

63% base formula · highest of 6

Naturium Tranexamic Topical Acid 5%

Shared formula DNA 3 of 22 original ingredients present

Water Niacinamide Glycerin Tranexamic Acid C13-15 Alkane Caprylic Dicaprylyl Carbonate Ethyl Macadamiate Behenyl Alcohol Glyceryl Stearate Butylene Glycol Silybum Marianum Seed Oil Tocopherol Lactobacillus Lecithin Bakuchiol Xanthan Gum Caprylyl Glycol Hydrogenated Lecithin Allantoin Glycine Soja (Soybean) Oil Hexylene Glycol

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

What matches: Discloses a HIGHER 5% tranexamic acid than Paula's Choice's own disclosed 3% — the shared headline active, confirmed stronger, not diluted. Niacinamide is also present in both formulas.
What differs: Niacinamide's own percentage is undisclosed here and it sits lower on the INCI (7th of 22, versus Paula's Choice's 2nd). No bakuchiol at all — Paula's Choice's third active has no counterpart in this formula.
Who it's for: The winner on the one active both brands disclose — $19.99 versus $55, well under half the price — but skip it if bakuchiol is specifically why you wanted the original.

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 in product name Naturium discloses 5% tranexamic acid in the product name; INCI from Ulta product page. Niacinamide is present (confirmed 7th of 22 ingredients) but its own percentage is not disclosed — a real gap versus Paula's Choice's disclosed 5%. Bakuchiol does not appear in this formula at all. Amazon price $19.99 PA-API-verified (ASIN B086YZRHH7), matching the existing verifiedbeautydata products.json record.

$19.99 for 30 mL → — not disclosed: the brand doesn't state active percentages, so this number cannot honestly exist.

Currently unavailable on Amazon

05 / Methodology

How we verified this

Verified 2026-07-30

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

Concentrations disclosed by brand
Concentration disclosed in product name

Sources for this report

INCIDecoder product page for Paula's Choice CLINICAL Discoloration Repair Serum (fetched 2026-07-30)
Dermstore and Cloud10Beauty product listings, both independently reproducing Paula's Choice's own brand copy verbatim: '3% tranexamic acid, 5% niacinamide, 0.5% bakuchiol' (fetched 2026-07-30) — a third mirror (SearchWellness) corroborates the same figures
Amazon Creators API (PA-API) — live price verification 2026-07-30 (PC Discoloration Repair, ASIN B092397B3V, $55.00)
verifiedbeautydata products.json verified record for Naturium Tranexamic Topical Acid 5% (ASIN B086YZRHH7, $19.99, disclosed 5% tranexamic acid)
The INKEY List Tranexamic Acid Hyperpigmentation Serum verified in products.json (ASIN B0B68Z9RCL, $19.00) — mentioned as a budget alternative only, not ranked as its own candidate

06 / Questions

Frequently asked

What is the best Paula's Choice Discoloration Repair Serum dupe?: Naturium Tranexamic Topical Acid 5% ($19.99) discloses a HIGHER 5% tranexamic acid than Paula's Choice's own disclosed 3% — the shared headline active, confirmed stronger, not diluted — for well under half the price.
Does Paula's Choice Discoloration Repair Serum disclose its ingredient percentages?: Yes — 3% tranexamic acid, 5% niacinamide, and 0.5% bakuchiol, disclosed directly in Paula's Choice's own marketing copy and independently confirmed across two retailer mirrors of the brand's product page.
Does Naturium's tranexamic acid serum replace the bakuchiol in Paula's Choice's formula?: No. Bakuchiol does not appear in Naturium's ingredient list at all — it has no counterpart on the dupe side. If bakuchiol is specifically why you want the original, no cheaper product here replicates it. If Naturium is ever unavailable, The INKEY List's Tranexamic Acid Hyperpigmentation Serum is a weaker fallback that doesn't disclose a percentage.