Vitamin C is one of the most researched brightening ingredients. Here is what it actually does in a skincare routine.

Vitamin C inhibits melanin production, which reduces the appearance of post-acne marks, sun spots, and uneven pigmentation over time. It also acts as a potent antioxidant that helps protect the skin barrier from environmental stressors.

Results from Vitamin C are gradual and cumulative. Most users see a difference in skin brightness after consistent use of 6 to 8 weeks.

Apply Vitamin C serum after cleansing and before moisturiser and sunscreen. In the morning, always follow with SPF50+ to protect the skin and support the antioxidant effect of the serum.

Vitamin C generally pairs well with niacinamide and hyaluronic acid. Avoid layering it directly with strong exfoliating acids like glycolic acid in the same step, as this can cause irritation for sensitive skin.

Pure ascorbic acid is unstable and oxidises when exposed to light and air, turning the serum orange or brown. Oxidised Vitamin C is less effective. Store Vitamin C serums in a cool, dark place and close the cap tightly after each use.

Vitamin C derivatives such as ascorbyl glucoside are more stable formulations and may be better suited for sensitive skin or hotter climates.