antioxidant
Neutralises reactive oxygen species, inhibits tyrosinase to reduce melanin synthesis, and acts as a co-factor in collagen hydroxylation. Synergistic with vitamin E and ferulic acid.
| Concern | Strength | Studies | What the research says |
|---|---|---|---|
| Uneven tone & radiance | Strong | — | Most abundant aqueous skin antioxidant; CE Ferulic ~8x UV-erythema protection; genuine radiance/antioxidant effect. Moderate (dullness is a soft endpoint; grade A but effect on the *concern* is moderate). |
| Dark spots & hyperpigmentation | Strong | 2 | Mechanism (tyrosinase inhibition via copper chelation) is well established. Older split-face RCTs (notably Espinal-Perez 2004 — 5% LAA vs 4% hydroquinone for melasma over 16 weeks) suggest LAA is meaningfully active for… |
| Fine lines & wrinkles | Strong | 4 | Humbert 2003 (PMID 12823436) is the most rigorous LAA monotherapy photoaging study: a 6-month double-blind, randomized, vehicle-controlled trial of 5% LAA cream applied daily to the lower neck and arms of female… |
| Loss of firmness | Relevant | — | Humbert 2003 (PMID 12823436) is the most rigorous LAA monotherapy photoaging study: a 6-month double-blind, randomized, vehicle-controlled trial of 5% LAA cream applied daily to the lower neck and arms of female… |
| Dark circles | Relevant | — | Kawana 2004 (J Cosmet Dermatol, n=57 open study): gel with phytonadione + 0.1% retinol + vit C/E reduced bluish dark circles. Vitamin C shown to increase under-eye brightness. Effect modest, mostly in combination,… |
No known conflicts — L-Ascorbic Acid isn’t flagged against any concern or skin condition.
Strength reflects the ingredient’s effect on each concern; study counts match research whose findings relate to that concern.
L-Ascorbic Acid is a antioxidant backed by a large, consistent body of clinical evidence (evidence tier 1 of 4). We track 10 studies for it, 10 reporting a positive effect. It is typically effective at 10–20% in a formulation.
Journal of Cosmetic Dermatology · 2023 · systematic review
Systematic review of topical vitamin C for melasma and photoaging: concludes topical ascorbic acid improves photoaging signs (fine lines, roughness, pigmentation) and contributes to melasma lightening, supporting its use as an antioxidant/depigmenting agent, while formulation instability/oxidation and study heterogeneity limit firm conclusions.
Experimental Dermatology · 2003 · rct · n=20
Double-blind, vehicle-controlled, 6-month trial: 5% vitamin C cream significantly improved clinical photoaging score; punch biopsies confirmed increased type I and type III collagen mRNA and protein, plus decreased MMP-1; one of the few biopsy-proven vitamin C studies
Dermatologic Surgery · 2002 · rct · n=10
Split-face design (n=10): 10% vitamin C serum significantly improved fine wrinkling and tactile roughness versus vehicle; 3-mm punch biopsies showed increased Grenz zone collagen with Masson trichrome staining on the treated side
Archives of Otolaryngology–Head & Neck Surgery · 1999 · rct · n=19
Vehicle-controlled trial (n=19): 10% topical vitamin C significantly reduced fine wrinkling (p<0.05), skin laxity, and roughness scores versus vehicle at 12 weeks; photographic assessment by blinded evaluators confirmed clinically meaningful improvement
International Journal of Dermatology · 2004 · rct
Randomized controlled trial (16 weeks): LAA vs hydroquinone melasma comparison.
Journal of Drugs in Dermatology · 2012 · rct · n=20
In a split-face study of 20 Chinese women, two weeks of topical 23.8% L-ascorbic acid serum with iontophoresis significantly improved dyspigmentation, surface roughness, and fine lines on treated sides versus untreated controls. 80% showed 2-3 grade improvement and 75% rated satisfaction excellent or good, without notable adverse effects.
+ 4 more studies in our evidence base.
In 799 products — most often serums (354), moisturizers (166), sunscreens (58), from $4.00 to $550.45. Set up a profile to rank these for your skin. Click any product to learn more.
Pixi
Glow Tonic Serum Exfoliating Radiance Serum
Serum
$24.0029.9ml · $0.80/ml
Ideal for
Not recommended for
Pixi
Glow Tonic Serum Exfoliating Radiance Serum
Serum
$24.0029.9ml · $0.80/ml
Ideal for
Not recommended for
Glow Tonic Serum Exfoliating Radiance Serum is a retinoid treatment by Pixi. Key ingredients include Glycerin, Glycolic Acid, Polysorbate 20.
Complete your skin profile to see how well this product matches your skin
Set up your skin profileSaturday Skin
Rub-A-Dub Refining Peel Gel Exfoliator
Exfoliant
$19.6073.9ml · $0.27/ml
Ideal for
Not recommended for
Saturday Skin
Rub-A-Dub Refining Peel Gel Exfoliator
Exfoliant
$19.6073.9ml · $0.27/ml
Ideal for
Not recommended for
Rub-A-Dub Refining Peel Gel Exfoliator is a exfoliant by Saturday Skin. Key ingredients include Glycerin, Butylene Glycol, Alcohol Denat.
Complete your skin profile to see how well this product matches your skin
Set up your skin profileBEVEL
Face & Beard Wash with Aloe Vera
Cleanser
$11.95118.3ml · $0.10/ml
Ideal for
Not recommended for
BEVEL
Face & Beard Wash with Aloe Vera
Cleanser
$11.95118.3ml · $0.10/ml
Ideal for
Not recommended for
Face & Beard Wash with Aloe Vera is a water cleanser by BEVEL. Key ingredients include Water, Glycerin, Decyl Glucoside.
Complete your skin profile to see how well this product matches your skin
Set up your skin profileBEVEL
Hydrating Face Gel with Vitamin C
Supplement
$12.95118.3ml · $0.11/ml
Ideal for
Not recommended for
BEVEL
Hydrating Face Gel with Vitamin C
Supplement
$12.95118.3ml · $0.11/ml
Ideal for
Not recommended for
Hydrating Face Gel with Vitamin C is a supplement by BEVEL. Key ingredients include Water, Glycerin, Polysorbate 80.
Complete your skin profile to see how well this product matches your skin
Set up your skin profileDIME
Serum
$32.0029.6ml · $1.08/ml
Ideal for
DIME
Serum
$32.0029.6ml · $1.08/ml
Ideal for
Hyper Glow Vitamin C Serum is a antioxidant serum by DIME. Key ingredients include Water, L-Ascorbic Acid, Glycerin.
Complete your skin profile to see how well this product matches your skin
Set up your skin profileSaturday Skin
Yuzu Vitamin C Brightening Sleep Mask
Supplement
$20.3050.3ml · $0.40/ml
Ideal for
Not recommended for
Saturday Skin
Yuzu Vitamin C Brightening Sleep Mask
Supplement
$20.3050.3ml · $0.40/ml
Ideal for
Not recommended for
Yuzu Vitamin C Brightening Sleep Mask is a supplement by Saturday Skin. Key ingredients include Glycerin, Niacinamide, Caprylic/Capric Triglyceride.
Complete your skin profile to see how well this product matches your skin
Set up your skin profile
ELEMIS
Elemis Superfood Facial Wash (200ml)
Cleanser
$42.00200ml · $0.21/ml
Ideal for
Not recommended for
ELEMIS
Elemis Superfood Facial Wash (200ml)
Cleanser
$42.00200ml · $0.21/ml
Ideal for
Not recommended for
Elemis Superfood Facial Wash (200ml) is a water cleanser by ELEMIS. Key ingredients include Sodium Lauroyl Sarcosinate, Glycerin, Cocamidopropyl Betaine.
Complete your skin profile to see how well this product matches your skin
Set up your skin profileRoC
Retinol Correxion Max Daily Hydration Creme - Fragrance-Free
Moisturizer
$37.9950.3ml · $0.76/ml
Ideal for
Not recommended for
RoC
Retinol Correxion Max Daily Hydration Creme - Fragrance-Free
Moisturizer
$37.9950.3ml · $0.76/ml
Ideal for
Not recommended for
Retinol Correxion Max Daily Hydration Creme - Fragrance-Free is a retinoid treatment by RoC. Key ingredients include Water, Glycerin, Dimethicone.
Complete your skin profile to see how well this product matches your skin
Set up your skin profileButtah Skin
Serum
$43.0029.6ml · $1.45/ml
Ideal for
Not recommended for
Buttah Skin
Serum
$43.0029.6ml · $1.45/ml
Ideal for
Not recommended for
Brightentng Vitamin C Serum is a antioxidant serum by Buttah Skin. Key ingredients include L-Ascorbic Acid, Propylene Glycol, Polysorbate 20.
Complete your skin profile to see how well this product matches your skin
Set up your skin profileOle Henriksen
Truth Serum Hydrating Vitamin C Serum
Serum
$58.0029.6ml · $1.96/ml
Ideal for
Not recommended for
Ole Henriksen
Truth Serum Hydrating Vitamin C Serum
Serum
$58.0029.6ml · $1.96/ml
Ideal for
Not recommended for
Truth Serum Hydrating Vitamin C Serum is a antioxidant serum by Ole Henriksen. Key ingredients include Glycerin, Hydroxyethylcellulose, Phenoxyethanol.
Complete your skin profile to see how well this product matches your skin
Set up your skin profileEducational information, not medical advice. Study findings summarise the cited research and may not reflect every formulation.