AntioxidantModern formulation
Vitamin C
L-ascorbic acid and derivatives
- Category
- Antioxidant
- Evidence
- Modern formulation
- Used
- On the skin and in the kitchen
- Pairs with
- Niacinamide, Peptides
Overview
An antioxidant vitamin involved in collagen synthesis, studied for brightening and photoprotective support.
What it is
Vitamin C is essential for collagen formation and acts as an antioxidant in the skin. Because humans cannot synthesize it, it must come from diet — and topical application delivers it directly to the epidermis.
L-ascorbic acid is the most researched form but is unstable; derivatives trade some potency for stability and gentleness.
How it works
- Neutralizes free radicals generated by UV exposure and pollution.
- Acts as a cofactor in collagen synthesis.
- May inhibit an enzyme involved in melanin production, associated with a brighter, more even tone over time.
Potential benefits
- Antioxidant support, especially alongside sunscreen
- Brighter-looking skin and softened appearance of dark spots
- Support for skin firmness over time
Potential benefits describe what research and use suggest may occur for many people — not guaranteed outcomes. Individual responses vary.
Who might consider it
- Dull or uneven tone
- Readers focused on prevention and sun-related aging
- Anyone looking to strengthen a morning routine
How it’s used
- Most often used in the morning under sunscreen.
- Store away from light and heat; discoloration signals oxidation.
Pairing with other ingredients
- NiacinamideCompatible in modern formulations.
- PeptidesOften layered for firmness-focused routines.
Things to know
- L-ascorbic acid at low pH can sting sensitive skin; derivatives may be gentler.
- Diet remains the primary source of vitamin C for the body.
Research
References & further reading
- 01
Topical vitamin C and the skin: mechanisms of action and clinical applications
Journal of Clinical and Aesthetic Dermatology, 2017
Reviews photoprotective and pigmentation-related evidence.
Art of Radiance distinguishes established evidence from emerging research and traditional practice. Read our science & sources approach.