COSRX Serums
Shop COSRX serums with 31+ available options, including Pure Fit Cica Serum, Niacinamide 15 Serum, Hyaluronic Acid 3 Serum, Vitamin C 13 and 23 serums, Vitamin Seed serums, and the 6 Peptide Skin Booster Serum. Compare calming, brightening, hydration, pore-care, and peptide formats in one COSRX serum collection.
By Skinsli editorial Updated
Buying guide
How to choose a COSRX serum
COSRX serums cover targeted routine concerns such as dullness, dehydration, sensitivity, uneven texture, and visible pores. This collection currently lists 31+ available COSRX serums, including Cica, Niacinamide 15, Hyaluronic Acid 3, Vitamin C 13, Vitamin C 23, Vitamin Seed, and 6 Peptide options.
Choose by active and concern
Start with the active name in the product title. Niacinamide 15 is the pore and uneven-tone lane, Hyaluronic Acid 3 is the dehydration lane, Vitamin C and Vitamin Seed serums are the brightening lane, and Pure Fit Cica Serum is the calming lane.
If you are new to serums, choose one concern first. Layering several strong actives before you know your tolerance makes it harder to understand what is working.
Niacinamide 15 Serum
COSRX The Niacinamide 15 Serum is the most direct choice here for pores, shine, and uneven-looking tone. The live grid includes 20 ml listings, with minor spacing differences in product titles.
Start a few times weekly if your skin is sensitive. It can sit after toner and before moisturizer in either a morning or evening routine.
Hyaluronic Acid 3 Serum
COSRX The Hyaluronic Acid 3 Serum is for skin that feels dehydrated, tight, or flat. It is a good first serum if your routine needs more water but not a stronger active.
Apply it to slightly damp skin after toner, then seal with cream. It pairs well with cica, ceramide, or propolis moisturizers.
Vitamin C and Vitamin Seed serums
The assortment includes COSRX Vitamin C 13, Vitamin C 23, and Vitamin Seed 13 serum titles. These are the better choices for dullness, post-blemish marks, and tone-care routines.
Introduce vitamin C slowly and use sunscreen each morning. If your skin is reactive, start with a lower-strength option before moving to a 23-style serum.
Pure Fit Cica Serum
COSRX Pure Fit Cica Serum, also shown in some titles as Sika Serum, is the calmer-feeling serum option. It suits skin that wants comfort after cleansing, weather changes, or overuse of actives.
Use it before cream and keep the rest of the routine simple. It is a practical partner for Pure Fit Cica Cream or another mild moisturizer.
6 Peptide Skin Booster Serum
COSRX The 6 Peptide Skin Booster Serum appears as a larger 150 ml format, which makes it different from the smaller 20 or 30 ml treatment serums. It can act as a broad support step before more targeted products.
Use it after cleansing and before heavier serum or cream. If you already use multiple actives, keep the peptide step steady and avoid changing everything at once.
Layering and routine order
Most COSRX serums sit after toner and before moisturizer. A simple order is watery booster, targeted serum, then cream; use sunscreen in the morning.
Do not start niacinamide, vitamin C, and acids all in the same week if your skin is sensitive. Add one serum, watch your skin, then decide whether another step is needed.
FAQ
Frequently asked questions
FAQ
Frequently asked questions
Which COSRX serum should I choose for pores and shine?
COSRX The Niacinamide 15 Serum is the clearest serum choice in this collection for pores, shine, and uneven-looking tone.
What is COSRX Hyaluronic Acid 3 Serum best for?
It is best for dehydration and tightness. Apply it after toner and seal it with moisturizer so the hydration lasts.
Should I pick COSRX Vitamin C 13 Serum or Vitamin C 23 Serum?
Choose Vitamin C 13 for a slower start and Vitamin C 23 if your skin already tolerates vitamin C well. Both need consistent sunscreen in the morning.
When should I use COSRX Pure Fit Cica Serum?
Use it when your skin feels stressed or easily irritated. It fits after toner and before cream, especially in a simplified routine.
How many COSRX serums are available here?
This collection currently lists 31+ available COSRX serums, including niacinamide, hyaluronic acid, vitamin C, cica, peptide, and Vitamin Seed options.
Is COSRX 6 Peptide Skin Booster Serum a treatment serum?
It works more like a broad support serum or booster, especially because it appears in a larger 150 ml format. Use it before heavier serums or cream.
Can I layer several COSRX serums together?
You can layer compatible serums, but start with one targeted product first. Be careful combining strong vitamin C, acids, and other active treatments in one routine.