What is Vitamin C?
Vitamin C is the classic brightening antioxidant in skincare. It fades dark spots, evens skin tone, supports collagen and helps defend skin against daily environmental damage. The purest, best-studied form is L-ascorbic acid; gentler derivatives suit sensitive skin.
How Vitamin C works
As an antioxidant, vitamin C neutralises free radicals from sun and pollution, while also interrupting excess pigment production to fade dark spots and brighten. Pure L-ascorbic acid is the most potent but can sting and oxidise; derivatives are gentler and more stable but usually milder.
Benefits of Vitamin C
Fades dark spots and dullness for a brighter, more even complexion.
Interrupts excess pigment for gradual fading of marks and sun spots.
Helps protect against daily sun and pollution damage - a great partner to SPF.
Supports collagen for firmer, healthier-looking skin over time.
Is Vitamin C good for your skin type?
Brightening is vitamin C’s signature strength.
Gradually fades marks and sun spots with consistent use.
Antioxidant support pairs perfectly with daily SPF.
Lightweight serums suit these skin types well.
Choose a low percentage or a gentle derivative, not high-strength L-ascorbic acid.
Vitamin C vs other ingredients
Both brighten and even tone. Vitamin C is a stronger antioxidant that can sting; niacinamide is gentler and also controls oil. They can be used together - the old “they cancel out” claim is a myth for modern formulas.
Pure L-ascorbic acid (often 10-20%) is the most proven but least stable and can sting. Derivatives such as sodium ascorbyl phosphate or THD ascorbate are gentler and more stable, but usually milder - a good choice for sensitive skin.
Both fade dark spots, but vitamin C also brightens overall and adds antioxidant defence, while alpha arbutin is a gentle, targeted spot-fader. They layer well together.
How to use Vitamin C
Use vitamin C in the morning on clean skin, before moisturiser and SPF - it boosts your sun protection. If using a high-strength L-ascorbic acid, start a few times a week and always follow with SPF. Store it somewhere cool and dark; if it turns deep orange or brown it has oxidised and lost potency.
Can you combine Vitamin C with other actives?
- With SPF. Yes - the ideal pairing. Vitamin C in the morning under sunscreen boosts antioxidant defence.
- With Niacinamide. Yes - modern formulas work fine together for extra brightening.
- With Retinol. Best split them - vitamin C in the morning, retinol at night - to avoid irritation.
Side effects & safety
Pure L-ascorbic acid can tingle or sting, especially at high strengths or on sensitive skin - lower the percentage or switch to a derivative if so. Always pair with SPF. Patch test new products. General information, not medical advice.