What the science says about Vitamin C

Peer-reviewed research on Vitamin C, summarised in plain language. Every study links to its record on PubMed so you can read it yourself.

Vitamin C for anti-aging

Some evidence for anti-aging

All 4 studies that tested it directly found it helped with signs of aging
It improved the look and texture of sun-damaged skin more than a placebo
It helped smooth wrinkles, roughness, crow’s-feet, and uneven skin tone
It did not clearly beat a placebo for how much water the skin held
No irritation or sensitivity was reported in one study

12 studies

Cosmeceuticals for antiaging: a systematic review of safety and efficacy.
Archives of dermatological research2024Systematic review1,236 participantsPositive
The review recommended vitamin C for aging skin, but noted that its long-term benefits and safety still need study.
PubMed 38758222 DOI
Potential Utilisation of Secretome from Ascorbic Acid-Supplemented Stem Cells in Combating Skin Aging: Systematic Review of A Novel Idea.
Cell journal2023Systematic reviewNeutral
A review found too little research to tell whether stem-cell secretomes made with vitamin C improve skin aging.
PubMed 37718762 DOI
Efficacy of topical vitamin C in melasma and photoaging: A systematic review.
Journal of cosmetic dermatology2023Systematic review139 participantsPositive
A review of 139 people found that vitamin C helped smooth wrinkles and lighten skin, while hydration improved as much with a placebo.
PubMed 37128827 DOI
Fractional microneedle radiofrequency with the application of vitamin C, E, and ferulic acid serum for neck skin rejuvenation: a prospective, double-blinded, split-neck, placebo-controlled trial.
The Journal of dermatological treatment2025RCT31 participantsPositive
In a 12-week study of 31 people, a serum with vitamin C used with microneedle radiofrequency improved neck wrinkles and appearance more than the procedure alone.
PubMed 40464749 DOI
Evaluation of the anti-wrinkle effect of an ascorbic acid-loaded dissolving microneedle patch via a double-blind, placebo-controlled clinical study.
International journal of cosmetic science2016RCT23 participantsPositive
In a study of 23 people, a vitamin C microneedle patch improved crow’s-feet scores and skin roughness without causing irritation or sensitivity.
PubMed 26648582 DOI
Clinical, biometric and structural evaluation of the long-term effects of a topical treatment with ascorbic acid and madecassoside in photoaged human skin.
Experimental dermatology2008RCT20 participants5%Positive
In a six-month study of 20 women, a skin treatment with vitamin C and madecassoside improved wrinkles, firmness, roughness, suppleness, and hydration.
PubMed 18503551 DOI
Topical ascorbic acid on photoaged skin. Clinical, topographical and ultrastructural evaluation: double-blind study vs. placebo.
Experimental dermatology2003RCT5%Positive
In a six-month study, vitamin C cream improved the look and texture of sun-damaged skin more than the cream base.
PubMed 12823436 DOI
Use of topical ascorbic acid and its effects on photodamaged skin topography.
Archives of otolaryngology--head & neck surgery1999RCT19 participantsPositive
In a 3-month study of 19 people, vitamin C serum improved facial wrinkles, roughness, and skin tone more than a placebo serum.
PubMed 10522500 DOI
A clinical evaluation of the efficacy and tolerability of a novel topical antioxidant formulation featuring vitamin C, astaxanthin, and fermented turmeric.
Journal of cosmetic dermatology2023Clinical trial32 participantsPositive
In a 12-week study of 32 women, a serum with vitamin C and other antioxidants improved skin quality and the look of fine lines.
PubMed 37608511 DOI
Novel Vitamin C and E and Green Tea Polyphenols Combination Serum Improves Photoaged Facial Skin.
Journal of drugs in dermatology : JDD2021Clinical trial31 participantsPositive
In a 12-week study of 31 women, a serum with vitamin C, vitamin E, and green tea improved wrinkles, smoothness, radiance, and skin density.
PubMed 34491027 DOI
Scientific validation of three-dimensional stereophotogrammetry compared to the IGAIS clinical scale for assessing wrinkles and scars after laser treatment.
Scientific reports2021Clinical trial48 participantsPositive
After laser resurfacing and vitamin C put on the skin, wrinkle and scar measures trended better in 48 people; the study could not separate vitamin C's effect from the laser.
PubMed 34117340 DOI
Double-blind, half-face study comparing topical vitamin C and vehicle for rejuvenation of photodamage.
Dermatologic surgery : official publication for American Society for Dermatologic Surgery [et al.]2002Clinical trial10 participants10% ascorbic acid; 7% tetrahexyldecyl ascorbatePositive
In a 12-week study of 10 people with sun damage, vitamin C improved wrinkles, while both sides of the face became more hydrated.
PubMed 11896774 DOI

Research context, not treatment advice. Studies are about the ingredient, not any one product.

How we grade research

Vitamin C for hyperpigmentation

Some evidence for hyperpigmentation

Most studies found vitamin C helped fade dark patches, especially melasma
It often worked better than a placebo when put on the skin for melasma
Used with microneedling or peels, it often improved dark patches more
Some studies found it worked about as well as other dark-spot treatments, not better
The side effects were usually mild and brief

19 studies

Efficacy and safety of microneedling with tranexamic acid versus microneedling with vitamin C in the treatment of melasma: a systematic review and meta-analysis.
Journal of medicine and life2026Meta-analysis232 participantsNeutral
A review of 232 people found similar short-term results for microneedling with vitamin C or tranexamic acid for melasma, with mild, brief side effects.
PubMed 42602406 DOI
Microneedling as an adjuvant to topical therapies for melasma: A systematic review and meta-analysis.
Journal of the American Academy of Dermatology2022Meta-analysis459 participantsNeutral
A large review included vitamin C among skin treatments used with microneedling for melasma, but could not compare results by treatment.
PubMed 33857549 DOI
Efficacy and tolerability of chemical peeling as a single agent for melasma in dark-skinned patients: A systematic review and meta-analysis of comparative trials.
Journal of cosmetic dermatology2020Meta-analysis478 participantsNeutral
A large review found no clear difference in melasma improvement between vitamin C iontophoresis and glycolic acid peels.
PubMed 32947652 DOI
Efficacy of topical vitamin C in melasma and photoaging: A systematic review.
Journal of cosmetic dermatology2023Systematic review139 participantsPositive
A review of 139 people found that vitamin C helped smooth wrinkles and lighten skin, while hydration improved as much with a placebo.
PubMed 37128827 DOI
Comparison of the Efficacy of Melasma Treatments: A Network Meta-Analysis of Randomized Controlled Trials.
Frontiers in medicine2021Systematic reviewPositive
A large review of many clinical trials found that vitamin C put on the skin helped treat melasma compared with a placebo.
PubMed 34660626 DOI
Topical Treatments for Melasma: A Systematic Review of Randomized Controlled Trials.
Journal of drugs in dermatology : JDD2019Systematic reviewNeutral
A large review listed vitamin C as a topical melasma treatment but gave no result showing how well it worked.
PubMed 31741361
Treatment of Acne Vulgaris-Associated Post-Inflammatory Dyschromia With Combination of Non-Ablative Laser Therapy and Topical Antioxidants.
Journal of drugs in dermatology : JDD2024RCT25 participantsPositive
In a 25-person study, adding a topical blend with vitamin C to laser treatment improved acne-related dark marks and redness more than laser treatment alone.
PubMed 39231081 DOI
Efficacy and Safety of tranexamic acid versus vitamin c after microneedling in treatment of melasma: Clinical and Dermoscopic study.
Journal of cosmetic dermatology2022RCT20 participantsPositive
After microneedling, vitamin C reduced melasma scores and improved pigmentation on one side of the face, with minimal side effects.
PubMed 34699671 DOI
Comparison of the efficacy of cysteamine 5% cream and hydroquinone 4%/ascorbic acid 3% combination cream in the treatment of epidermal melasma.
Journal of cosmetic dermatology2022RCT65 participants3%Positive
In a 4-month study of 65 people with melasma, a cream with vitamin C and hydroquinone improved skin discoloration and quality of life, much like cysteamine.
PubMed 35510765 DOI
Effect of a topical antioxidant serum containing vitamin C, vitamin E, and ferulic acid after Q-switched 1064-nm Nd:YAG laser for treatment of environment-induced skin pigmentation.
Journal of cosmetic dermatology2020RCT18 participantsPositive
In a 2-week study of 18 people, a vitamin C serum used after laser treatment reduced dark spots more than laser treatment alone, with no clear difference in redness.
PubMed 32052907 DOI
Evaluating the Safety and Efficacy of a Topical Formulation Containing Epidermal Growth Factor, Tranexamic Acid, Vitamin C, Arbutin, Niacinamide and Other Ingredients as Hydroquinone 4% Alternatives to Improve Hyperpigmentation: A Prospective, Randomized, Controlled Split Face Study.
Journal of cosmetic science2020RCTPositive
In a one-month study of 18 people, a cream with vitamin C and other ingredients improved facial dark spots more and caused less irritation than hydroquinone.
PubMed 33022197
A split-face, investigator-blinded comparative study on the efficacy and safety of Q-switched Nd:YAG laser plus microneedling with vitamin C versus Q-switched Nd:YAG laser for the treatment of recalcitrant melasma.
Journal of cosmetic and laser therapy : official publication of the European Society for Laser Dermatology2017RCT16 participantsPositive
In 16 people with melasma, adding vitamin C with microneedling after laser improved melasma more than laser alone, with similar side effects and recurrence.
PubMed 28657378 DOI
Efficacy of Trichloro-Acetic Acid Peel Alone Versus Combined Topical Magnesium Ascorbyl Phosphate for Epidermal Melasma.
Journal of the College of Physicians and Surgeons--Pakistan : JCPSP2016RCT148 participants5%Positive
In a 6-week trial of 148 people with melasma, a vitamin C cream used with an acid peel improved skin more than the peel alone.
PubMed 27504543
A clinical evaluation of the efficacy and tolerability of a novel topical antioxidant formulation featuring vitamin C, astaxanthin, and fermented turmeric.
Journal of cosmetic dermatology2023Clinical trial32 participantsPositive
In a 12-week study of 32 women, a serum with vitamin C and other antioxidants improved skin quality and the look of fine lines.
PubMed 37608511 DOI
Split-Face Comparative Analysis Of Micro-Needling With Tranexamic Acid Vs Vitamin C Serum In Melasma.
Journal of Ayub Medical College, Abbottabad : JAMC2022Clinical trial30 participantsMixed
In a 6-week trial of 30 people with melasma, vitamin C used with microneedling improved melasma about as much as tranexamic acid.
PubMed 35466647 DOI
Effective lightening of facial melasma during the summer with a dual regimen: A prospective, open-label, evaluator-blinded study.
Journal of cosmetic dermatology2020Clinical trial10 participants30%Positive
In a 12-week study of 10 people, a vitamin C serum used with tinted sunscreen improved facial dark patches and skin tone.
PubMed 33058522 DOI
Efficacy and safety of a 3-in-1 antiaging night facial serum containing melatonin, bakuchiol, and ascorbyl tetraisopalmitate through clinical and histological analysis.
Journal of cosmetic dermatology2020Clinical trial24 participantsPositive
A night serum combining vitamin C with two other ingredients improved wrinkles, pigmentation, and other signs of skin aging over 12 weeks.
PubMed 32061043 DOI
Whitening effect of L-ascorbate-2-phosphate trisodium salt on solar lentigos.
Archives of dermatological research2019Clinical trial27 participants6%Neutral
A vitamin C lotion slightly lightened sun spots and nearby skin in a 24-week study of 27 women.
PubMed 30778667 DOI
Efficacy of 694-nm fractional Q-switched ruby laser (QSRL) combined with sonophoresis on levorotatory vitamin C for treatment of melasma in Chinese patients.
Lasers in medical science2016Clinical trial26 participantsPositive
In a study of 26 people with melasma, laser treatment with vitamin C delivered by sound waves reduced dark patches, and side effects were few and brief.
PubMed 27126411 DOI

Research context, not treatment advice. Studies are about the ingredient, not any one product.

How we grade research

Products with Vitamin C

Products we have confirmed contain Vitamin C, from their ingredient lists.