COSRX The Retinol 0.5 Oil 20ml vs numbuzin No.9 Secret Firming Serum 50ml

Shared ingredients· none here

Product facts and full ingredient lists side by side

on 2+ labelsonly on this labelnot on this labelIngredient	Recommended COSRX COSRX The Retinol 0.5 Oil 20ml $18.90 Save	numbuzin numbuzin No.9 Secret Firming Serum 50ml $21.00 Save
Basics
Type & size	Serum · size not on the record	Serum · size not on the record
Brand origin	Korean	Korean
Offers
Where to buy	Not recorded	Not recorded
Formula
Key activesdiffers	squalane, retinol, panthenol, allantoin, ascorbic acid, sodium hyaluronate, hyaluronic acid	niacinamide
Free ofdiffers	Not recorded	sulfate-free, alcohol-free, paraben-free
Heads-updiffers	pregnancy caution · photosensitizingPore data not yet reviewed	fragrance allergens · fungal-acne triggerPore data not yet reviewed
Fit & community
Rating	No reviews yet	No reviews yet
Best for	Not recorded	Not recorded
Data quality
Label coveragediffers	Partially captured — 42 of 60 label entries matched, some checks not run	Fully parsed · 29 ingredients
Key actives · 8
allantoin	yes	no
hyaluronic acid Pregnancy: generally fine	yes	no
hyaluronic acid (salt form) Pregnancy: generally fine	yes	no
pro-vitamin b5	yes	no
squalane	yes	no
vitamin a	yes	no
vitamin b3	no	yes
vitamin c	yes	no
Rest of the labels · 31
3-o-ethyl ascorbic acid Pregnancy: generally fine	yes	no
beta-carotene	yes	no
bht	yes	no
butylene glycol	no	yes
caprylyl glycol	no	yes
cedrus atlantica bark oil	no	yes
di-c12-13 alkyl malate	yes	no
glutathione	yes	no
glyceryl polymethacrylate	yes	no
glyceryl stearate citrate Possible fungal-acne trigger	no	yes
hydrogenated lecithin	yes	no
hydrogenated vegetable oil	no	yes
hydroxymethoxyphenyl decanone	yes	no
hydroxypropyltrimonium hyaluronate Pregnancy: generally fine	no	yes
lauric acid Fungal-acne trigger	yes	no
limonene	no	yes
linalool	no	yes
myristic acid Fungal-acne trigger	yes	no
pentaerythrityl tetraethylhexanoate	no	yes
polyglyceryl-10 stearate Possible fungal-acne trigger	yes	no
shea butter	no	yes
sodium acetylated hyaluronate Pregnancy: generally fine	yes	no
sodium hyaluronate crosspolymer Pregnancy: generally fine	yes	no
sodium polyacrylate	no	yes
sorbitan isostearate Possible fungal-acne trigger	yes	no
tocopheryl acetate	yes	no
tocotrienols	yes	no
trehalose	yes	no
vitamin e	yes	no
water	yes	no
xanthan gum	no	yes

COSRX's label is only partially captured — rows may grow as parsing completes.

Rows come from parsed labels and live offers. Where a label isn’t fully captured, we say so instead of guessing.

The bottom line

Both lines come from the parsed labels and the prices on this page — neither product is the reference, and neither is called the better one.