Jan Marini Bioglycolic Face Cleanser
Everything behind the verdicts on this product: the rule that fired for each concern, the three answers and the documents they rest on, every study on the row with the date it was opened, and the versions of the tables that produced them. Nothing here is edited by hand; it is generated from the same records the verdicts are.
The scaleRecommendedGoodSupportingEarly evidenceNot for thisAvoidhow it works
Engine 5.2.0 · rules 0.5.1 · evidence table ev-2026.10-r231 · computed October 13, 2026 · how we decide · the evidence table · the anchors
for Acne
Rinse-off lotion: Glycolic Acid gets seconds of contact, so this supports a routine for acne rather than treating it.
Nothing here targets the concern directly, but the product’s job — barrier care, gentle cleansing, photoprotection — is the recognised companion to treating it. Rinse-off products carrying leave-on actives land here too.
- Rule
- R6 → Supporting role. A first-line active (approved, monograph-listed or named in a current guideline) or a supported active (trial-backed, or a reference standard by mechanism) or an active with early or mechanistic evidence only or an active researched for the concern and found wanting or an active with no evidence row for the concern yet; in a rinse-off form the claim cannot use.
q1 = first-line | supported | plausible | none | not-assessed · q2 = contact-limited
Why this rule exists: Contact time cannot deliver a leave-on claim; the product is judged on its job (cleansing without aggravating). Explicit exceptions (BPO wash, SA cleanser, medicated shampoos) never reach this rule because their rows set rinse_off_ok.
Rule R6 decided 2,083 verdicts across the catalog; “Supporting role” is the verdict on 7,796 of 45,446. The full register. - Carrying active
- Glycolic Acid
- 1 · Standing
- Plausible — trials support it
- 2 · Form
- Contact-limited — concentration not declared; read from the position in the ingredient list
Studied range: 10%, from the OTC monograph or label; needs leave-on contact; judge it after about 8 weeks - 3 · Tolerability
- Standard tolerability — fungal triggers
Cautions: fungal-acne triggers. - Evidence dots
- Moderate evidence
Row checked against its sources on July 17, 2026 (evidence table ev-2026.10-r231). - What readers report
- No reviews read yet for this product. Shown beside the verdict; never blended into it.
- Verdict since
- September 5, 2026 (unchanged across rebuilds since then)
The studies and documents on the row
- Clinical evaluation of glycolic acid chemical peeling in patients with acne vulgaris: a randomized, double-blind, placebo-controlled, split-face comparative study — Dermatologic Surgery (Wakayama Medical University) (2014), opened July 16, 2026
- Chemical peels for acne vulgaris: a systematic review of randomised controlled trials — BMJ Open — meta-analysis not possible; included peel RCTs rated 'very low to moderate' quality (2018), opened July 16, 2026
- Topical azelaic acid, salicylic acid, nicotinamide, sulphur, zinc and fruit acid (alpha-hydroxy acid) for acne — Cochrane Database of Systematic Reviews — GRADE-using, but its AHA certainty rating attaches to PGA vs an active comparator, NOT to inflammatory lesion count; see reviewer_notes (2020), opened July 16, 2026
- Guidelines of care for the management of acne vulgaris — Journal of the American Academy of Dermatology (AAD) — glycolic acid and AHAs appear in NONE of the 18 graded recommendations (2024), opened July 16, 2026
← Back to the verdict All acne products → Disclose a concentration or correct a fact →
for Blackheads
Rinse-off lotion: Glycolic Acid gets seconds of contact, so this supports a routine for blackheads rather than treating it.
Nothing here targets the concern directly, but the product’s job — barrier care, gentle cleansing, photoprotection — is the recognised companion to treating it. Rinse-off products carrying leave-on actives land here too.
- Rule
- R6 → Supporting role. A first-line active (approved, monograph-listed or named in a current guideline) or a supported active (trial-backed, or a reference standard by mechanism) or an active with early or mechanistic evidence only or an active researched for the concern and found wanting or an active with no evidence row for the concern yet; in a rinse-off form the claim cannot use.
q1 = first-line | supported | plausible | none | not-assessed · q2 = contact-limited
Why this rule exists: Contact time cannot deliver a leave-on claim; the product is judged on its job (cleansing without aggravating). Explicit exceptions (BPO wash, SA cleanser, medicated shampoos) never reach this rule because their rows set rinse_off_ok.
Rule R6 decided 2,083 verdicts across the catalog; “Supporting role” is the verdict on 7,796 of 45,446. The full register. - Carrying active
- Glycolic Acid
- 1 · Standing
- Plausible — trials support it
- 2 · Form
- Contact-limited — concentration not declared; read from the position in the ingredient list
Studied range: 5–10%, from the OTC monograph or label; needs leave-on contact; judge it after about 8 weeks - 3 · Tolerability
- Standard tolerability — fungal triggers
Cautions: fungal-acne triggers. - Evidence dots
- Moderate evidence
Row checked against its sources on July 17, 2026 (evidence table ev-2026.10-r231). - What readers report
- No reviews read yet for this product. Shown beside the verdict; never blended into it.
- Verdict since
- September 5, 2026 (unchanged across rebuilds since then)
The studies and documents on the row
- Clinical evaluation of glycolic acid chemical peeling in patients with acne vulgaris: a randomized, double-blind, placebo-controlled, split-face comparative study — Dermatologic Surgery (2014), opened July 16, 2026
- Chemical peels for acne vulgaris: a systematic review of randomised controlled trials — BMJ Open — systematic review, NOT meta-analysed (heterogeneity); no GRADE (2018), opened July 16, 2026
- Guidelines of care for the management of acne vulgaris — Journal of the American Academy of Dermatology (AAD clinical guideline, GRADE-based) — cited as evidence that glycolic acid appears in NONE of its 18 recommendations (2024), opened July 16, 2026
- The effect of physically applied alpha hydroxyl acids on the skin pore and comedone — International Journal of Cosmetic Science — EXCLUDED from rct_count: both arms received AHA (the randomised contrast is negative pressure, not the acid) (2015), opened July 16, 2026
← Back to the verdict All blackheads products → Disclose a concentration or correct a fact →
for Dullness
Rinse-off lotion: Glycolic Acid gets seconds of contact, so this supports a routine for dullness rather than treating it.
Nothing here targets the concern directly, but the product’s job — barrier care, gentle cleansing, photoprotection — is the recognised companion to treating it. Rinse-off products carrying leave-on actives land here too.
- Rule
- R6 → Supporting role. A first-line active (approved, monograph-listed or named in a current guideline) or a supported active (trial-backed, or a reference standard by mechanism) or an active with early or mechanistic evidence only or an active researched for the concern and found wanting or an active with no evidence row for the concern yet; in a rinse-off form the claim cannot use.
q1 = first-line | supported | plausible | none | not-assessed · q2 = contact-limited
Why this rule exists: Contact time cannot deliver a leave-on claim; the product is judged on its job (cleansing without aggravating). Explicit exceptions (BPO wash, SA cleanser, medicated shampoos) never reach this rule because their rows set rinse_off_ok.
Rule R6 decided 2,083 verdicts across the catalog; “Supporting role” is the verdict on 7,796 of 45,446. The full register. - Carrying active
- Glycolic Acid
- 1 · Standing
- Supported — its mechanism is established (a reference standard, not a trial result)
- 2 · Form
- Contact-limited — concentration not declared; read from the position in the ingredient list
Studied range: 4–10%, from the trials on the row; needs leave-on contact; judge it after about 8 weeks - 3 · Tolerability
- Standard tolerability
- Evidence dots
- Limited evidence
Row checked against its sources on July 17, 2026 (evidence table ev-2026.10-r231). - What readers report
- No reviews read yet for this product. Shown beside the verdict; never blended into it.
- Verdict since
- September 5, 2026 (unchanged across rebuilds since then)
The studies and documents on the row
- Harry's Cosmeticology / Baran & Maibach Textbook of Cosmetic Dermatology — humectant, emollient and occlusive classification — standard reference text
← Back to the verdict All dullness products → Disclose a concentration or correct a fact →
for Rough Texture
Rinse-off lotion: Glycolic Acid gets seconds of contact, so this supports a routine for rough texture rather than treating it.
Nothing here targets the concern directly, but the product’s job — barrier care, gentle cleansing, photoprotection — is the recognised companion to treating it. Rinse-off products carrying leave-on actives land here too.
- Rule
- R6 → Supporting role. A first-line active (approved, monograph-listed or named in a current guideline) or a supported active (trial-backed, or a reference standard by mechanism) or an active with early or mechanistic evidence only or an active researched for the concern and found wanting or an active with no evidence row for the concern yet; in a rinse-off form the claim cannot use.
q1 = first-line | supported | plausible | none | not-assessed · q2 = contact-limited
Why this rule exists: Contact time cannot deliver a leave-on claim; the product is judged on its job (cleansing without aggravating). Explicit exceptions (BPO wash, SA cleanser, medicated shampoos) never reach this rule because their rows set rinse_off_ok.
Rule R6 decided 2,083 verdicts across the catalog; “Supporting role” is the verdict on 7,796 of 45,446. The full register. - Carrying active
- Glycolic Acid
- 1 · Standing
- Supported — its mechanism is established (a reference standard, not a trial result)
- 2 · Form
- Contact-limited — concentration not declared; read from the position in the ingredient list
Studied range: 4–10%, from the trials on the row; needs leave-on contact; judge it after about 8 weeks - 3 · Tolerability
- Standard tolerability
- Evidence dots
- Limited evidence
Row checked against its sources on July 17, 2026 (evidence table ev-2026.10-r231). - What readers report
- No reviews read yet for this product. Shown beside the verdict; never blended into it.
- Verdict since
- September 5, 2026 (unchanged across rebuilds since then)
The studies and documents on the row
- International Cosmetic Ingredient Dictionary and Handbook — declared function — Personal Care Products Council
- Harry's Cosmeticology / Baran & Maibach Textbook of Cosmetic Dermatology — humectant, emollient and occlusive classification — standard reference text
← Back to the verdict All rough texture products → Disclose a concentration or correct a fact →
for Large Pores
Rinse-off lotion: Glycolic Acid gets seconds of contact, so this supports a routine for large pores rather than treating it.
Nothing here targets the concern directly, but the product’s job — barrier care, gentle cleansing, photoprotection — is the recognised companion to treating it. Rinse-off products carrying leave-on actives land here too.
- Rule
- R6 → Supporting role. A first-line active (approved, monograph-listed or named in a current guideline) or a supported active (trial-backed, or a reference standard by mechanism) or an active with early or mechanistic evidence only or an active researched for the concern and found wanting or an active with no evidence row for the concern yet; in a rinse-off form the claim cannot use.
q1 = first-line | supported | plausible | none | not-assessed · q2 = contact-limited
Why this rule exists: Contact time cannot deliver a leave-on claim; the product is judged on its job (cleansing without aggravating). Explicit exceptions (BPO wash, SA cleanser, medicated shampoos) never reach this rule because their rows set rinse_off_ok.
Rule R6 decided 2,083 verdicts across the catalog; “Supporting role” is the verdict on 7,796 of 45,446. The full register. - Carrying active
- Glycolic Acid
- 1 · Standing
- None
- 2 · Form
- Contact-limited — concentration not declared; read from the position in the ingredient list
Studied range: 5–10%, from the OTC monograph or label; needs leave-on contact; judge it after about 8 weeks - 3 · Tolerability
- Standard tolerability
- Evidence dots
- Not from a trial row
- What readers report
- No reviews read yet for this product. Shown beside the verdict; never blended into it.
- Verdict since
- September 5, 2026 (unchanged across rebuilds since then)
The studies and documents on the row
- The effect of physically applied alpha hydroxyl acids on the skin pore and comedone — International Journal of Cosmetic Science — the ONLY on-endpoint randomised study (optical image analyser); both arms received AHA, so it cannot isolate the acid (2015), opened July 16, 2026
- The effect of glycolic acid on the treatment of acne in Asian skin — Dermatologic Surgery — cited as the PROVENANCE of the pore claim, NOT as evidence: its pore observation is subjective and uncontrolled, so it fails the admission rule (1997), opened July 16, 2026
- "The efficacy and adverse effects of treatment options for facial pores: A review article" — Journal of Cosmetic Dermatology — reviews 19 facial-pore clinical trials (591 cases); full text paywalled (HTTP 402), so its trial list is the one unchecked enumeration (2023), opened July 16, 2026
← Back to the verdict All large pores products → Disclose a concentration or correct a fact →
as a cleanser
Judged as a cleanser, it comes up short on: rinses clean without stripping, surfactant mildness.
- Rule
- J3 → Falls short. Otherwise — when no earlier rule in this group matched.
Category job score below 65 over the features that can be measured from the label (5.1.0: unmeasured features no longer enter at a prior; when under half the spec's weight is measurable there is no job verdict). The sentence names the criterion missed, never 'its basics'. - Measured from the label
- surfactant mildness, pH match to skin, rinses clean without stripping, puts something back
- Tolerability
- Standard tolerability
- Fungal-acne triggers
A verdict is Dermington’s assessment of how well a product’s ingredients fit a concern — never a claim about what the product treats. Every rule is public and the same for every product; a brand cannot buy a reading. How we decide · what has changed · disclaimer.