COSRX
Pure Vitamin C 23% Serum
A medium holy trinity active for hyperpigmentation and dullness, built around Vitamin C and PHA, with reviewed formula data, and some patch-test cautions.
Routine step
Serums & Treatments
Category
Holy Trinity Active
When to use
Night
Skin fit
Dark spots
10/10
Dullness
10/10
Aging
7/10
Texture
5/10
Best for
Key ingredients
L-Ascorbic Acid 23%
Brightens dark spots and stimulates firmer-looking skin support
Tocopherol
Stabilizes vitamin C and provides antioxidant protection
Sodium Hyaluronate
Draws moisture into the skin to prevent dryness
Cautions
This is currently unavailable. Check stock before you build a routine around it.
Best kept for night. Some actives do not play nicely with daytime sun.
Go slow if your skin is new to actives. Start a few nights a week.
Sensitive skin may sting. Patch-test before using it all over.
Formula checked
Koracle has a reviewed ingredient source for this product.
Checked 2026-04-30
Currently unavailable
Keep it on your radar, but check stock before you plan around it.
Koracle is skincare education, not medical or dermatology advice. Patch-test new products. Ask a licensed dermatologist about acne, rosacea, eczema, allergic reactions, pregnancy concerns, or symptoms that persist.