CODE3: 22 PubMed Citations Supporting the Formula
CODE3 is a patent-pending pigment-correction serum from Alón Labs, founded by board-certified plastic surgeon Dr. Daniel Jacobs. Every active ingredient in the formula is supported by peer-reviewed, PubMed-indexed evidence. This page is the canonical research library for CODE3 — organized by ingredient, ranked by evidence tier, with a one-paragraph plain-English summary and an explanation of how CODE3 applies each finding. Each citation links to its PubMed record so you can read the source for yourself.
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Tier 1 — Strong head-to-head or randomized clinical trial evidence Tier 1
Lead claims for CODE3 — strong RCT or head-to-head trial support.
Topical tranexamic acid head-to-head vs. hydroquinone for melasma — randomized clinical trial
This RCT compared topical tranexamic acid against hydroquinone, the long-standing standard pigment-correction agent. The trial reported comparable melasma reduction with similar or better topical tolerability for the tranexamic acid arm.
How CODE3 applies it: CODE3 features 10% topical tranexamic acid as a hero active. This trial supports the brand's position that TXA is a clinically credible pigment-correction agent for melasma at topical concentrations.
Topical tranexamic acid for melasma — additional head-to-head trial vs. hydroquinone
A second head-to-head randomized trial evaluating topical tranexamic acid against hydroquinone, again reporting comparable melasma improvement on standardized melasma severity assessment.
How CODE3 applies it: The second supporting trial reinforces that topical TXA is reproducibly comparable to hydroquinone for melasma — supporting CODE3's claim that a non-tyrosinase-inhibitor mechanism can match the historical Rx standard.
Bakuchiol vs. retinol for facial photoaging — randomized double-blind 12-week trial
A randomized double-blind trial compared topical bakuchiol against topical retinol for 12 weeks on facial photoaging endpoints (wrinkles, hyperpigmentation, overall photoaging). The bakuchiol arm produced non-inferior efficacy with significantly better tolerability — less scaling, stinging, and irritation than the retinol arm.
How CODE3 applies it: CODE3 includes bakuchiol as a hero active because of its evidence as a retinol-tolerability alternative. In the CODE3 formula, bakuchiol's role is to support a calmer inflammatory environment around pigment-prone skin without the irritation loop that can make pigment harder to manage.
Niacinamide vs. hydroquinone for melasma — split-face randomized clinical trial
This split-face RCT compared niacinamide against hydroquinone on the same patients' melasma. The niacinamide arm achieved similar objective colorimetry improvement with fewer reported side effects than the hydroquinone arm.
How CODE3 applies it: Niacinamide is a foundation active in the CODE3 formula. This trial supports its inclusion as a supporting pigment-correction active that compounds with the TXA + bakuchiol + quercetin hero stack.
Topical melatonin antiaging — split-face assessor-blinded randomized trial
A randomized split-face assessor-blinded trial of topical melatonin reported improvements in wrinkles, skin roughness, and hydration over the trial period.
How CODE3 applies it: Melatonin is included in CODE3 as an antioxidant supporting active. This trial supports its inclusion as a clinically credible topical antioxidant.
Topical hyaluronic acid (different molecular weights) — randomized clinical trial
An RCT of topical HA across different molecular-weight formulations reported improved hydration and elasticity, with the lower-MW HA arm additionally showing wrinkle-depth improvement.
How CODE3 applies it: Hyaluronic acid is a foundation active in the CODE3 formula for skin hydration support, helping the formula deliver immediate sensorial benefit alongside the longer-arc pigment correction story.
Tier 2 — Moderate RCT or disease-specific evidence Tier 2
Supporting claims — clinically credible but not the primary lead.
10% urea lotion in aging xerotic skin — clinical study
A clinical evaluation of 10% urea lotion in aging xerotic (dry) skin reported improved hydration and barrier outcomes over the study window.
How CODE3 applies it: Urea is included in CODE3 as a humectant and as a known penetration enhancer (see PMID 30378232 below).
Topical urea — comprehensive review (moisturizer + penetration enhancer)
A review covering urea's dual mechanism: humectant moisturizer and penetration enhancer that can support the bioavailability of co-formulated topical actives.
How CODE3 applies it: Urea's penetration-enhancer function helps the hero actives reach their target depth in the formula.
Topical ferulic acid in papulopustular rosacea — RCT
An RCT of topical ferulic acid in papulopustular rosacea reported moderate improvement in lesion count and barrier outcomes with acceptable short-term tolerability.
How CODE3 applies it: Ferulic acid is a supporting antioxidant in CODE3, included for its barrier-supporting profile.
Topical and/or oral resveratrol — randomized placebo-controlled trial
A placebo-controlled randomized trial with topical and/or oral resveratrol arms; the topical arm reported skin-parameter benefits with mostly mild adverse events.
How CODE3 applies it: Resveratrol is included in the CODE3 antioxidant supporting cluster.
Glutathione in dermatology — systematic review
A systematic review of glutathione for skin lightening reported a limited-to-moderate signal, with notable heterogeneity across trials and risk-of-bias concerns. The review recommended cautious interpretation pending higher-quality trials.
How CODE3 applies it: Glutathione is a supporting antioxidant in CODE3. The brand does not lead with glutathione efficacy claims for pigment lightening, given the systematic review's bias caveats.
Topical glutathione — placebo-controlled trial
A topical placebo-controlled trial reported a limited-moderate skin-lightening signal with generally mild adverse effects.
How CODE3 applies it: A second supporting reference for glutathione's inclusion in CODE3 as a topical antioxidant.
Topical cholecalciferol + microneedling for vitiligo — comparative trial
A small comparative trial in vitiligo (a depigmenting condition, not the abnormal-pigment focus of CODE3). Topical cholecalciferol with microneedling was well tolerated in the trial.
How CODE3 applies it: Cholecalciferol is included in CODE3 as a foundation active. This evidence is disease-specific to vitiligo and does not support generalized cosmetic anti-aging or pigment claims; the brand does not extrapolate beyond what the trial shows.
Tier 3 — Limited or indirect evidence Tier 3
Formula rationale only — no standalone efficacy claims.
Quercetin-containing onion-extract gel for rosacea — randomized clinical trial
An RCT of a topical onion-extract gel containing quercetin for rosacea reported short-term tolerability and a moderate efficacy signal in the indication studied. The trial used a combination product, so isolated quercetin efficacy cannot be inferred.
How CODE3 applies it: Quercetin is a hero active in CODE3 for its mechanism — flavonoid antioxidant addressing oxidative stress in pigment signaling — not as a standalone clinical claim. The brand frames quercetin's role as upstream-signaling support, not as a depigmenting agent.
Urea / arginine / carnosine cream vs. glycerol cream for xerosis — RCT
A combination-cream RCT comparing a urea/arginine/carnosine cream against a glycerol cream for xerosis. Good tolerability was reported; isolated carnosine efficacy was not established.
How CODE3 applies it: L-carnosine is included in CODE3 as a supporting antioxidant. The brand does not make standalone carnosine claims.
Vitamin E in normal and damaged skin — review
A review article on vitamin E's role in normal and damaged skin, supporting an antioxidant and photoprotective rationale. High-quality modern monotherapy RCT efficacy data remains limited.
How CODE3 applies it: Vitamin E is included as a supporting antioxidant. CODE3 does not make standalone vitamin E efficacy claims; this citation supports the formulation rationale only.
Topical caffeine 10% in psoriasis — randomized clinical trial
An RCT of topical 10% caffeine in psoriasis (not a cosmetic indication) reported limited-to-moderate dermatologic signal with mild local itching. Cosmetic-specific efficacy evidence remains weaker.
How CODE3 applies it: Caffeine is a foundation active in CODE3. This citation is the closest peer-reviewed reference for topical caffeine in dermatology; it supports the formula's rationale, not a standalone cosmetic claim.
Tier 4 — Insufficient evidence Tier 4
Included for formulation completeness only — the brand makes no efficacy claims.
Pterostilbene in skin photoaging — scoping review
A scoping review found insufficient robust PubMed-indexed human topical RCT evidence for pterostilbene in skin applications. Human topical safety data is also limited.
How CODE3 applies it: Pterostilbene is included for formulation completeness. The brand makes no efficacy claims.
L-tyrosine in scar repigmentation — preclinical / animal model
A preclinical animal repigmentation model. No robust human skincare RCT evidence is available for topical L-tyrosine in cosmetic applications.
How CODE3 applies it: L-tyrosine is included for formulation completeness. The brand makes no efficacy claims.
Tier 5 — Preservative and formulation role only Tier 5
No skincare efficacy claims — included for cosmetic-formulation safety.
Phenoxyethanol — cosmetic safety review
A cosmetic safety review of phenoxyethanol concluded that it is generally considered safe in cosmetics up to 1% use concentration, with rare sensitization reported.
How CODE3 applies it: Phenoxyethanol is the primary preservative in CODE3 at standard cosmetic-use concentration.
Sorbic acid — clinical patch-test allergy evidence
Patch-test data on sorbic acid documents that allergic and irritant contact dermatitis can occur in sensitized users, though it is generally well tolerated in most populations.
How CODE3 applies it: Sorbic acid is a supporting preservative. Users with known sorbate sensitivity should consult their dermatologist before use.
1,2-Glycols (including caprylyl glycol) — cosmetic safety assessment
A cosmetic safety assessment of 1,2-glycols concluded that caprylyl glycol is considered safe at cosmetic-use concentrations, with possible mild irritation in sensitive users.
How CODE3 applies it: Caprylyl glycol functions in CODE3 primarily as a humectant and preservative-booster.