
Closest formulaClosest formula
numbuzin
numbuzin No.5 Goodbye Blemish Serum 50ml
12 of 23 ingredients shared
12 shared · 11 differ, 0 key actives
$53.48
vs $49.50 original
Main difference · Adds Ascorbyl Glucoside
A formula alternative, not an identical product.

TIRTIR VC Dark Spot Eraser Serum 50ml
your reference
$49.50
Only serum matches are shown.
picking by how much of the original's full ingredient list is shared · log in and set a skin profile to use this.
picking by how much of the original's full ingredient list is shared My skin: Log in and set a skin profile to use this.

Closest formulaClosest formula
numbuzin
12 of 23 ingredients shared
12 shared · 11 differ, 0 key actives
$53.48
vs $49.50 original
Main difference · Adds Ascorbyl Glucoside
Best valueClosest formula
Goodal
12 of 23 ingredients shared
12 shared · 11 differ, 0 key actives
$0.62/ml
$24.90
vs $49.50 original
Save $24.60 (50%)
Main difference · Adds Allantoin

Same actives, different base
Dr. Althea
sharedVitamin B3,Hyaluronic Acid (salt form),Cica,Vitamin C,
11 of 23 ingredients shared
11 shared · 12 differ, 0 key actives
$54.05
vs $49.50 original
Main difference · Adds Tranexamic Acid

Same actives, different base
Banobagi
sharedVitamin B3,Hyaluronic Acid (salt form),Cica,Vitamin C,
11 of 23 ingredients shared
11 shared · 12 differ, 0 key actives
$23.40
vs $49.50 original
Save $26.10 (53%)
Main difference · Adds Allantoin

Same actives, different base
Anua
sharedVitamin B3,Hyaluronic Acid (salt form),Cica,Vitamin C,
9 of 23 ingredients shared
9 shared · 14 differ, 0 key actives
$42.50
vs $49.50 original
Save $7.00 (14%)
Main difference · Adds Tranexamic Acid

Same actives, different base
VT Cosmetics
sharedVitamin B3,Cica,Vitamin C,Pro-vitamin B5
missing Hyaluronic Acid (salt form)adds Ceramide Np,Sodium Ascorbyl Phosphate,Retinyl Palmitate
10 of 23 ingredients shared
10 shared · 13 differ, 1 key active
$92.43
vs $49.50 original
Main difference · Adds Ceramide Np
![[KOPHER] Curepair Signature Ampoule 50ml](https://images.weserv.nl/?url=cdn.shopify.com%2Fs%2Ffiles%2F1%2F0061%2F7516%2F2486%2Ffiles%2Fkopher-curepair-signature-ampoule-50ml-01.jpg%3Fv%3D1760936906&w=200&output=webp&q=82&we)
Similar formula
Kopher
sharedVitamin B3,Hyaluronic Acid (salt form),Cica,Pro-vitamin B5
missing Vitamin Cadds Ceramide Np
15 of 23 ingredients shared
15 shared · 8 differ, 1 key active
$56.00
vs $49.50 original
Main difference · No Vitamin C
Similar formula
Atomy
sharedVitamin B3,Hyaluronic Acid (salt form),Pro-vitamin B5
missing Cica,Vitamin Cadds AHA exfoliant (gentle),Argan oil,Squalane,Ceramide Npadds fragrance
12 of 23 ingredients shared
12 shared · 11 differ, 2 key actives
$39.85
vs $49.50 original
Save $9.65 (19%)
Main difference · No Cica

Similar formula
Centellian24
sharedVitamin B3,Hyaluronic Acid (salt form),Vitamin C,Pro-vitamin B5
missing Cicaadds Ascorbyl Glucoside,Allantoin,Ceramide Np,BHA exfoliant,
11 of 23 ingredients shared
11 shared · 12 differ, 1 key active
$24.26
vs $49.50 original
Save $25.24 (51%)
Main difference · No Cica
![[Pyunkang Yul] Black Tea Boosting Serum 45ml](https://images.weserv.nl/?url=cdn.shopify.com%2Fs%2Ffiles%2F1%2F0595%2F2769%2F2455%2Ffiles%2Fproduct_images_1733971245.a48bbec27b96d6320ad1b54effc85b261734475164.jpg%3Fv%3D1734492980&w=200&output=webp&q=82&we)
Similar formula
Pyunkang Yul
sharedHyaluronic Acid (salt form),Cica,Pro-vitamin B5
missing Vitamin B3,Vitamin Cadds Ceramide Np
11 of 23 ingredients shared
11 shared · 12 differ, 2 key actives
$76.50
vs $49.50 original
Main difference · No Vitamin B3

Similar formula
Pyunkang Yul
sharedHyaluronic Acid (salt form),Cica,Pro-vitamin B5
missing Vitamin B3,Vitamin Cadds Ceramide Np
11 of 23 ingredients shared
11 shared · 12 differ, 2 key actives
$23.27
vs $49.50 original
Save $26.23 (53%)
Main difference · No Vitamin B3

Similar formula
Isntree
11 of 23 ingredients shared
11 shared · 12 differ, 2 key actives
$23.60
vs $49.50 original
Save $25.90 (52%)
Main difference · No Cica
Candidates share at least three label ingredients with TIRTIR VC Dark Spot Eraser Serum 50ml. Common bases are down-weighted, meaningful actives count more, and this view is scoped to the same product type. Commissions never affect order.
Hero actives first. We compare the meaningful actives named on the original’s label. Ubiquitous bases — water, glycerin, hyaluronic acid, butylene glycol — are never treated as evidence that two formulas do the same job.
Then the rest of the list. How many of the original’s ingredients also appear on the other label, always shown as a count against the original’s own length — never a headline number on its own. Candidates share at least three label ingredients with the original, common bases are down-weighted, and meaningful actives count more.
Price. Savings compare the best real offer we hold for each product, or its catalog price when there is no offer, and only within one currency. Commissions never affect the order of this list.
Your profile. Signed in, rows also mark ingredients you told us to avoid and the goals you set. That changes what is highlighted and what is ranked first — never which products qualify, and never what anyone else sees.
method v2 · 2026-08-30 — tiers replace the single 50%-share floor; same-brand aliases collapsed; hero actives exclude commodity humectants; sunscreens are never called dupes; labels under 10 ingredients are never called dupe sources.
Other products from the same brand that share decoded ingredients with TIRTIR VC Dark Spot Eraser Serum 50ml — related formulas, not dupes.