Peer-reviewed research on Vitamin C, summarised in plain language. Every study links to its record on PubMed so you can read it yourself.
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 participantsPositive
In a large review of 232 people with melasma, vitamin C put on the skin with microneedling faded dark patches about as well as tranexamic acid over 6-16 weeks.
Efficacy and safety of mesotherapy with tranexamic acid versus vitamin C in the treatment of melasma: A meta-analysis and systemic review.
Journal of cosmetic dermatology2024Meta-analysis127 participantsPositive
In a large review of 127 people with melasma, vitamin C mesotherapy faded dark patches and worked about as well as tranexamic acid.
A Bayesian network meta-analysis of 14 molecules inhibiting UV daylight-induced pigmentation.
Journal of the European Academy of Dermatology and Venereology : JEADV2024Meta-analysis7%Positive
In a large review of 14 clinical trials, vitamin C put on the skin ranked second early for reducing UV-related darkening.
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 participantsPositive
In a large review of 478 people with melasma, vitamin C put on the skin worked about as well as glycolic acid for fading dark patches.
Efficacy of topical vitamin C in melasma and photoaging: A systematic review.
Journal of cosmetic dermatology2023Systematic review139 participantsPositive
In a large review of 139 people with melasma or sun-damaged skin, vitamin C put on the skin significantly lightened dark patches.
Systematic review of clinical studies assessing the needling for treatment of melasma: Focusing on efficacy, safety, and recurrence rate.
Journal of cosmetic dermatology2022Systematic reviewNegative
In a large review of melasma studies, vitamin C put on the skin with microneedling showed the smallest fading of dark patches by week 4.
Comparison of the Efficacy of Melasma Treatments: A Network Meta-Analysis of Randomized Controlled Trials.
Frontiers in medicine2021Systematic reviewPositive
In a large review of clinical trials in people with melasma, topical vitamin C ranked above several other treatments for fading dark patches.
Topical Treatments for Melasma: A Systematic Review of Randomized Controlled Trials.
Journal of drugs in dermatology : JDD2019Systematic reviewNeutral
This large review of clinical trials included vitamin C for melasma, but the abstract does not say whether it helped dark patches.
Hydroquinone-Free, Tetrahexyldecyl Ascorbate Antioxidant Serum for Hyperpigmented and Photodamaged Skin to Achieve Skin Health.
Journal of cosmetic dermatology2026RCT30%Positive
In a clinical trial of people with photoaged, darkened skin, a 30% vitamin C serum visibly faded dark patches.
Evaluation of the Efficacy of a Serum Containing Niacinamide, Tranexamic Acid, Vitamin C, and Hydroxy Acid Compared to 4% Hydroquinone in the Management of Melasma.
Journal of cosmetic dermatology2025RCT60 participants0.2% of a stabilized form of vitamin CPositive
In a 5-month trial of 60 women with melasma, a serum with vitamin C and other actives faded dark patches about as well as hydroquinone.
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 clinical trial of 25 people with acne-related dark marks, a skin treatment including vitamin C used after laser helped fade dark marks more than laser alone.
Efficacy and Safety of tranexamic acid versus vitamin c after microneedling in treatment of melasma: Clinical and Dermoscopic study.
Journal of cosmetic dermatology2022RCT20 participantsPositive
In a clinical trial of 20 people with melasma, vitamin C put on the skin after microneedling helped fade dark patches.
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 trial of 65 people with melasma, a cream with vitamin C and hydroquinone reduced dark patches and skin darkness.
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 trial of 18 people with melasma or sun spots, a vitamin C combination serum used after laser faded dark patches more on the treated side.
Comparing the efficacy of Myjet-assisted tranexamic acid and vitamin C in treating melasma: A split-face controlled trial.
Journal of cosmetic dermatology2020RCT17 participantsPositive
In a clinical trial of 17 people with melasma, vitamin C put on the skin weekly for 8 weeks made dark patches fade.
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 science2020RCT18 participantsPositive
In a 1-month split-face trial of 18 people with facial dark patches, a cream with vitamin C and other ingredients improved dark patches more than hydroquinone 4%.
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 a study of 16 people with melasma, vitamin C put on the skin with microneedling after laser faded dark patches more than laser alone.
Salicylic acid peeling combined with vitamin C mesotherapy versus salicylic acid peeling alone in the treatment of mixed type melasma: A comparative study.
Journal of cosmetic and laser therapy : official publication of the European Society for Laser Dermatology2017RCT50 participants10%Neutral
In a 50-person study of melasma, both groups improved, but the abstract does not say vitamin C worked better than salicylic acid peel alone.
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, vitamin C used with a peel faded dark patches better than the peel alone.
Clinical efficacy and safety of 20% glycolic peel, 15% lactic peel, and topical 20% vitamin C in constitutional type of periorbital melanosis: a comparative study.
Journal of cosmetic dermatology2016RCT90 participants20%Positive
In a 12-week trial of 90 people with under-eye dark patches, vitamin C put on the skin improved pigmentation, but less than glycolic or lactic peels.
Prospective study of using 1064-nm Q-switched Nd: YAG combined with radiofrequency-imported vitamin C on pigmented infraorbital dark circles.
Lasers in medical science2024Clinical trial30 participantsPositive
In a clinical trial of 30 people with pigmented under-eye dark circles, vitamin C used with laser and radiofrequency reduced darkening and melanin particles.
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 trial of 32 women, a serum with vitamin C improved the look of dark patches and uneven skin tone.
Magnesium ascorbyl phosphate vesicular carriers for topical delivery; preparation, in-vitro and ex-vivo evaluation, factorial optimization and clinical assessment in melasma patients.
Drug delivery2022Clinical trialPositive
In people with melasma, vitamin C put on the skin in 2 gel types lowered how dark the patches were over 1 to 6 months.
Split-Face Comparative Analysis Of Micro-Needling With Tranexamic Acid Vs Vitamin C Serum In Melasma.
Journal of Ayub Medical College, Abbottabad : JAMC2022Clinical trial30 participantsPositive
In a 6-week trial of 30 people with melasma, vitamin C put on the skin with microneedling helped fade dark patches.
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 trial of 31 women with photoaged skin, a serum with vitamin C was linked to a reduced look of dark spots.
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% tetrahexyldecyl ascorbatePositive
In a 12-week trial of 10 women with melasma, a vitamin C serum used with sunscreen lightened dark patches.
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
In a 12-week study of 24 people with skin aging, a serum with vitamin C and other ingredients improved dark patches.
Whitening effect of L-ascorbate-2-phosphate trisodium salt on solar lentigos.
Archives of dermatological research2019Clinical trial27 participants6%Mixed
In a 24-week trial of 27 women with sun spots, topical vitamin C gave small fading benefits on some skin color measures, but not on the main scoring scale.
Research context, not treatment advice. Studies are about the ingredient, not any one product.
How we grade research for hyperpigmentationProducts we have confirmed contain Vitamin C, from their ingredient lists.
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