COSMETIC LENS
All ingredients
Active Ingredients

Tretinoin

维A酸

Also known as: Retinoic Acid, Retin-A

What it does

  • Most potent topical retinoid
  • Anti-aging
  • Acne treatment
  • Cell turnover

Effective concentration

Beginner 0.025% Intermediate 0.05% Advanced 0.1%

Prescription only. Start low, increase gradually.

Evidence

Strong evidence

Most studied retinoid with decades of research. FDA approved for acne and photoaging.

Skin types

Well suited for: Normal Oily
Use with caution: Sensitive Dry Rosacea Eczema

Significant adjustment period. Peeling, redness, dryness common initially.

Helps with

Acne & Breakouts Aging & Fine Lines Fine Lines Wrinkles Dark Spots & Hyperpigmentation Uneven Texture

Interactions

Use with care AHAs/BHAs

Increased irritation risk. Introduce slowly.

Use with care Benzoyl Peroxide

Can degrade tretinoin. Use at different times.

Irritation potential
High
Comedogenic rating
0 / 5
Pregnancy
Avoid during pregnancy

STRICTLY AVOID during pregnancy. Known teratogen.

Good to know

Prescription-strength retinoid. The gold standard for anti-aging. Requires sunscreen.

References

Compound data from PubChem (U.S. National Library of Medicine).

Further reading

Selected peer-reviewed reviews on this ingredient, indexed by Europe PMC. Provided as background, not proof of any specific claim.

Related ingredients

Retinol Retinal Bakuchiol Niacinamide Adapalene Palmitoyl Pentapeptide-4

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Educational information only — not medical advice. Always patch test and consult a dermatologist for skin concerns.