Ascorbic Acid — Skincare Ingredient
Ascorbic Acid
Brightens skin tone over 4-8 weeks of consistent use
Also known as: L-Ascorbic Acid · Pure Vitamin C
What is Ascorbic Acid?
Pure L-ascorbic acid — the most-researched, most-potent form of vitamin C. Unstable in water and air.
What Ascorbic Acid Does
- Brightens skin tone over 4-8 weeks of consistent use
- Neutralizes UV-induced free radicals — boosts SPF protection
- Stimulates collagen synthesis (proven in vivo)
- Inhibits tyrosinase enzyme to prevent new pigmentation
Skin Type Compatibility
How well Ascorbic Acid works for each skin type:
How to Use Ascorbic Acid
Layering Ascorbic Acid
How Ascorbic Acid combines with other actives in your routine:
Research
Ascorbic Acid in Our Catalog
- La Roche-Posay28
- Neutrogena24
- The Ordinary21
- Garnier20
- Paula's Choice19
Browse Products with Ascorbic Acid
Frequently Asked Questions
What is Ascorbic Acid?
Pure L-ascorbic acid — the most-researched, most-potent form of vitamin C. Unstable in water and air.
What does Ascorbic Acid do for skin?
Brightens skin tone over 4-8 weeks of consistent use Neutralizes UV-induced free radicals — boosts SPF protection Stimulates collagen synthesis (proven in vivo) Inhibits tyrosinase enzyme to prevent new pigmentation
Is Ascorbic Acid safe during pregnancy?
Yes — Ascorbic Acid is generally considered safe to use during pregnancy and breastfeeding. As always, consult your doctor about your specific routine.
What skin types is Ascorbic Acid good for?
Ascorbic Acid works well for Dull skin, Hyperpigmentation, Photoaging, Daily AM use.
How do I use Ascorbic Acid?
Effective at 10-20% at pH <3.5. UNSTABLE — store airtight + dark. Use AM under SPF for amplified UV defense. Best paired with vitamin E + ferulic acid.
What is the comedogenic rating of Ascorbic Acid?
Ascorbic Acid has a comedogenic rating of 0/5 — non-comedogenic, safe for acne-prone skin.
What is the irritation potential of Ascorbic Acid?
Ascorbic Acid has an irritation risk score of 3/5 — moderate — sensitive skin should patch-test.
What ingredients pair well with Ascorbic Acid?
Ascorbic Acid layers beautifully with: Tocopherol, Ferulic Acid, Hyaluronic Acid.
What ingredients should I avoid mixing with Ascorbic Acid?
Avoid using Ascorbic Acid in the same routine layer as: Retinol, Salicylic Acid, Glycolic Acid. Alternate days or use AM/PM separation.
Related Ingredients
Often used together with or similar to Ascorbic Acid: