Ascorbic acid illustration

Ascorbic acid

ah·skor·bik acid

A pure form of vitamin C that’s dermatologist-trusted to help shield skin from UV damage and improve pigmentation, fine lines and overall firmness.

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First month £24.99 £2.90


Sun damage, pigmentation, signs of ageing, dullness, pollution.


Up to 15%


See studies

Key benefits

  • Antioxidant protection illustration

    Antioxidant protection

    Defence against UV rays and air pollution — key contributors to skin ageing

  • Firming, lifting, anti-ageing illustration

    Firming, lifting, anti-ageing

    Boosts collagen production, preventing fine lines and loss of firmness.

  • Unbeatable brightening illustration

    Unbeatable brightening

    Dermatologists’ first choice to visibly brighten skin and combat pigmentation.

Start consultation

First month £24.99 £2.90

“Use ascorbic acid before sunscreen in the morning for optimal protection against sunlight and pollution. It also helps to tackle pigmentation and dullness.”
Dr Catriona Maybury - Consultant Dermatologist

Dr Catriona Maybury
Consultant Dermatologist

Woman face with applied cream on the cheek

Understanding ascorbic acid

  • Ascorbic acid helps defend the skin from damaging UV rays and air pollution — key contributors to premature ageing.
  • Gives your skin’s collagen production a supercharged boost, preventing fine lines and loss of firmness.
  • The most research-backed form of topical vitamin C — and the dermatologists’ first choice for combating pigmentation and visibly brightening the skin.

Reasons to choose Dermatica

  • Your own personalised formula, created by dermatology experts with science-backed ingredients.
  • An optional Vitamin C 15%: Fresh Batch Ascorbic Acid treatment booster to brighten and protect your skin, and elevate the results of your formula.
  • Easy delivery straight to your door every 28 days.
  • Unlimited and ongoing free dermatology consultations.
£24 .99
Start consultation

First month £24.99 £2.90

Smiling Woman With Dermatica Bottle

Delving into the details

Ascorbic acid is an antioxidant, and when applied to the skin at the right strength, it helps protect it from UV and free radical damage — the leading causes of premature skin ageing. It’s the most researched form of vitamin C available today, and can improve the look of hyperpigmentation (dark patches), fine lines and overall firmness in as little as 6 weeks.

Show me the studies

studies on Ascorbic acid

Cutting-edge ingredients require cutting-edge research. We conduct systematic reviews to make sure we’re using ingredients with the highest level of clinical evidence from reputable research trials.

  • Double blinded RCT 5% topical ascorbic acid used for 6 months. Highly significant decrease in deep furrows observed.

    Humbert et al. 2003 (Exp Derm)

  • Double blind half-face study. 10% topical ascorbic acid and 7% tetrahexyldecyl ascorbate over 3 months. Significant improvement in wrinkling, roughness, laxity, sallowness.

    Traikovich et al. 1999 (Arch Orolaryn)

  • Double blind, half-face study. 10% topical ascorbic acid and 7% tetrahexyldecyl ascorbate over 3 months. Improved hydration, significantly reduced photoaging scores.

    Fitzpatrick et al. 2002 (Derm Surg)

  • Split-face study of topical 23.8% L-ascorbic acid serum over 2 weeks. Reduced pigmentation, roughness with improvements in wrinkles.

    Xu et al. 2012 (Drugs in Derm)

Commonly asked questions about ascorbic acid

What does Ascorbic Acid do for your skin?
Ascorbic Acid is a potent antioxidant, and at 15% concentration it can have numerous benefits for your skin. This includes preventing photoageing, pigmentation, wrinkles, and loss of firmness from sun damage. When mixed with other antioxidants like vitamin E, it’s particularly great at enhancing sun protection from your SPF and evening out the skin tone.

It can also help improve the look of fine lines, repair and nourish the skin, as well as boost your skin’s overall antioxidant supply.
How long does Ascorbic Acid take to work?
With daily use, you can begin to see improvements in pigmentation, fine lines and overall firmness in as little as 6–8 weeks.
How do you store Ascorbic Acid properly?
Antioxidants like ascorbic acid lose their effectiveness when they’re exposed to oxygen and light. Be sure to choose products that are in non-transparent tubes or bottles with an airless pump so the ingredients remain stable for as long as possible. Store it in a cool, dry place away from sunlight.
Is Ascorbic Acid an exfoliant?
No. Unlike AHAs, topical retinoids or scrubs, ascorbic acid doesn’t exfoliate the skin or remove dead skin cells.
Which ingredients should you avoid mixing with ascorbic acid?
It’s not recommended to use exfoliants like AHAs, BHAs or physical scrubs with ascorbic acid at the same time. Using these ingredients together could increase your risk of irritation or damage your skin barrier.
Is it safe to use ascorbic acid with my personalised formula?
Yes. However, to prevent skin irritation, apply your Vitamin C product at a different time of the day to your personalised formula. Our dermatology experts recommend applying Vitamin C in the morning, and your personalised formula in the evening.

If you start to experience any irritation, take a break from Vitamin C for a few days and check in with your dermatology experts if you need to. We’re here to help and answer your questions whenever you need.
What’s the difference between Ascorbic Acid and Vitamin C skincare?
Ascorbic acid is a derivative of Vitamin C, and has more research behind its effects than any of its other forms. The different derivatives of Vitamin C in skincare have a wide range of benefits, and each one will give your skin different results.

Because of the extent to which it’s been studied, ascorbic acid is the gold standard, and most dermatologist-backed, of all the vitamin C derivatives.
What are the side effects of Ascorbic Acid?
Some people who use Ascorbic Acid may experience the following side effects:
  • Itching
  • Redness or inflammation (erythema)
  • Skin irritation
  • Tingling or burning sensation on application

As a Dermatica customer, if you experience any of these side effects, you can get in touch with our clinical team for help via your dashboard. A dermatology expert will be on hand to answer your questions whenever you need.