How Vitamin C Works
Vitamin C (ascorbic acid) is perhaps the most scientifically validated brightening ingredient available in skincare today. It neutralises free radicals — unstable molecules generated by UV exposure, pollution, and stress — that damage collagen and trigger melanin overproduction, leading to premature ageing and hyperpigmentation.
- Inhibits melanin synthesis to fade dark spots and uneven tone
- Stimulates collagen production for firmer, more resilient skin
- Provides antioxidant protection against UV and environmental damage
- Brightens overall complexion and restores radiance
Forms of Vitamin C
L-ascorbic acid is the pure, active form with the strongest clinical evidence. It must be stabilised at a low pH (3.5–3.8) to remain effective. Ascorbyl glucoside and magnesium ascorbyl phosphate are gentler derivatives that convert to ascorbic acid on the skin — ideal for reactive or sensitive types.
Choosing the Right Concentration
For beginners, start with 5–10% ascorbic acid. For experienced users seeking maximum brightening, 15–20% is the effective range. Above 20%, the increased concentration doesn't necessarily increase efficacy but does increase the risk of irritation.
Pairing vitamin C with ferulic acid and vitamin E amplifies antioxidant protection by up to eight times — making this combination one of the most powerful defensive measures in skincare science.
How to Use Vitamin C Correctly
Apply vitamin C in the morning after cleansing and before moisturiser, as its antioxidant activity works synergistically with SPF. Store in a dark, cool place and discard if the serum turns orange or brown — oxidised vitamin C is ineffective.
- Apply to clean, dry skin as the first serum step each morning
- Wait 30 seconds before layering other products on top
- Always follow with broad-spectrum SPF — vitamin C is not a sunscreen
- Store away from sunlight and heat to extend shelf life
