Rankings / Longevity — Supplements

Tretinoin (all-trans retinoic acid)

Longevity · Retinoid — RAR agonist

Tier A

Reviewed by Read Off Label · Last reviewed · How we grade

vitaminprescriptionotc
8 / 10
Tier A
Ev 10 Bn 10 Sf 5

Bottom line

Read Off Label grades Tretinoin (all-trans retinoic acid) as A (8.0/10) based on very strong evidence, very strong benefit magnitude, and a med-risk safety profile.

Topical tretinoin has multiple RCTs reporting changes in photoaging outcomes (Kligman tradition).

Studied, labeled, or reported-use context: 0. — Rx (tretinoin); adapalene 0.1% OTC since 2016; not individualized guidance.

What the evidence says

Topical tretinoin has multiple RCTs reporting changes in photoaging outcomes (Kligman tradition). Adapalene is the closest OTC alternative. Clinical and dermatology protocols commonly apply tretinoin to dry skin because wet skin can increase irritation, and pair retinoid use with photoprotection. Irritation often occurs during the first weeks to months; severity and persistence vary.

Mechanism

Active metabolite of vitamin A; binds retinoic acid receptors (RARα/β/γ); normalizes follicular keratinization, increases collagen synthesis, thickens epidermis, fades dyspigmentation

Studied, labeled, or reported dose & route

0.025-0.1% topical cream/gel nightly on dry skin; tolerability protocols commonly begin at 2-3 applications per week and increase gradually

This records doses and routes described in studies, approved labeling, clinical practice, or documented use. It is not individualized guidance and does not establish safety; context changes with indication, formulation, health history, monitoring, and other medicines.

Citations

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Common questions

What does the evidence show about Tretinoin (all-trans retinoic acid)'s effects?
Read Off Label rates the evidence for Tretinoin (all-trans retinoic acid) as Very Strong and the benefit magnitude as very strong, producing an overall grade of A (8.0/10). Topical tretinoin has multiple RCTs reporting changes in photoaging outcomes (Kligman tradition).
What safety findings are reported for Tretinoin (all-trans retinoic acid)?
Tretinoin (all-trans retinoic acid) has a med risk profile in the database. Med (irritation, dryness, purging, photosensitivity, pregnancy safety concern; pregnancy guidance generally advises discontinuation) Legal status: Rx (tretinoin); adapalene 0.1% OTC since 2016.
What doses or routes are reported for Tretinoin (all-trans retinoic acid)?
0.025-0.1% topical cream/gel nightly on dry skin; tolerability protocols commonly begin at 2-3 applications per week and increase gradually This is context from studies, approved labeling, clinical practice, or documented use; it is not individualized guidance and does not establish safety.
How does Tretinoin (all-trans retinoic acid) work?
Active metabolite of vitamin A; binds retinoic acid receptors (RARα/β/γ); normalizes follicular keratinization, increases collagen synthesis, thickens epidermis, fades dyspigmentation

This is an independent synthesis of published research by a non-clinician. Scores are opinions supported by citations, not prescriptions. See the full disclaimer and methodology for how this score was produced and what it does and doesn't mean.