Vitamin C

Pure or derivative?

• Ascorbic acid, "pure" vitamin C, is the most studied form but also the least stable and sometimes the least comfortable on sensitive skin.
• Derivatives are more stable and gentler, often with a more gradual effect. Check the form listed in the ingredients of each product page.

Which product to choose?

• To start: a moderate concentration, such as the Freshly Juiced Vitamin Drop by Klairs.
• Sensitive skin: vitamin C combined with centella, such as the Light On Serum Centella + Vita C by Beauty of Joseon.
• Dull skin and dark spots: more concentrated formulas, such as the Vitamin C 13 Serum by Cosrx or the Deep Vita C Ampoule by Medicube. See also our pigmentation skincare.
• Blemishes: the Green Lemon Vita C Blemish Serum by Anua.

How to use it

Apply it preferably in the morning, before your cream and sunscreen: the two complement each other. Keep the bottle tightly closed, away from light and heat; a formula that turns noticeably darker has oxidised. If you also use exfoliating acids or retinol, keep them for the evening.

Read more: Korean vs Western vitamin C: the same molecule, a different philosophy