COSRX The Blue Copper Peptide Bakuchiol Serum, Glow & Plumping
Ingredients and claims, checked
Last checked September 7, 2026
What is it like at a glance?
What the ingredients do
Hydration leads, with 9 of 39 ingredients. It also contains Bakuchiol.
Worth knowing
- Contains drying alcohol
Made for
What is this product?
- Key ingredients
- Copper Tripeptide-1 0.5%, Bakuchiol 0.25%, Niacinamide
- When
- Morning and evening
A serum made without any oil, with five forms of hyaluronic acid. It comes in a 50 ml size.
Who is it for?
Good for
- People avoiding fragrance
Less suited to
- Skin that reacts to alcohol
What's good, and what to watch for?
Good points
- Contains Copper Tripeptide-1 0.5%, Bakuchiol 0.25%
Watch-outs
- Contains drying alcohol
What is in it?
The full ingredient list as the brand publishes it, in the printed order. Tap a name to read about that ingredient.
This brand publishes its ingredient list in Korean only. Names below are the matching INCI names from the Korean Cosmetic Association ingredient dictionary.
Key ingredientWorth a closer look
- Water
- Butylene Glycol
- Glycerin
- Dipropylene Glycol
- Niacinamide
- 1,2-Hexanediol
- Betaine
- Diethoxyethyl Succinate
- Ammonium Acryloyldimethyltaurate/VP Copolymer
- Dimethicone
- Copper Tripeptide-1
- Polyglyceryl-6 Caprylate
- Polyglyceryl-4 Caprate
- Bakuchiol
- Hydrogenated Lecithin
- Alcohol
- Sodium Methyl Stearoyl Taurate
- Ethylhexylglycerin
- Hydroxypropyl Starch Phosphate
- Disodium EDTA
- Adenosine
- Caprylyl Glycol
- Tocopherol
- Dipeptide Diaminobutyroyl Benzylamide Diacetate
- Acetyl Hexapeptide-1
- Acetyl Heptapeptide-4
- Panthenol
- Inositol
- Acetyl Hexapeptide-8
- Sodium Hydroxide
- Propanediol
- Beta-Glucan
- Sodium Hyaluronate
- Hyaluronic Acid
- Sodium Hyaluronate Crosspolymer
- Hydrolyzed Collagen
- Hydrolyzed Hyaluronic Acid
- Sodium Acetylated Hyaluronate
- Acetyl Octapeptide-3
Ingredients with no mark are ones we found nothing notable about, and when marks overlap on one ingredient we show the caution first.
Claims
See each claim, checked (2)
Claims, checked
Blue (Copper Tripeptide)
backed by evidenceGyeolgwang (Glow & Plumping)
plausible, not tested
We quote each claim exactly as the brand published it, then check it against the ingredient list and the brand's own documents.
Which articles cover it?
Articles on this site that write about this product.
- Bakuchiol or retinol: the gentle one is the one you cannot checkRetinoid labels print a level 37 times out of 86. Bakuchiol labels print one four times out of 40. That asymmetry decides which of the two you can shop for.
- Peptides on a Korean label, and the billion fold range between themFive Korean products that print every peptide level they hold. The highest is half a percent and the lowest is two thousandths of a part per billion.