Tretinoin
The Gold Standard
All-Trans Retinoic Acid (ATRA) is the most studied retinoid for acne and photoaging. Proper introduction is the difference between irritation and transformation.
Cellular Mechanism
Unlike over-the-counter retinol, Tretinoin does not require conversion by the skin. It binds directly to Retinoic Acid Receptors (RAR), instantly signaling cells to speed up turnover and upregulate collagen production.
Avoid Mixing With:
- Benzoyl Peroxide Can oxidize Tretinoin molecules
- Vitamin C (L-AA) Significant pH conflict / irritation
- AHA/BHA Acids Compounded barrier disruption
- Physical Scrubs Micro-tears during retinization
The “Sandwich” Protocol
For new users or those with sensitive skin barriers.
Buffer Layer
Apply a thin layer of basic moisturizer to damp skin. Let dry completely (15 mins).
Pea-Sized Active
Apply Tretinoin. Dot onto forehead, cheeks, and chin. Avoid eyes and mouth corners.
Seal Layer
Apply a second layer of moisturizer to lock in hydration and prevent TEWL.
Timeline of Expectations
Weeks 1-4
The Retinization Period
Expect peeling, redness, and the ‘purge’ (temporary acne increase). Focus on barrier repair.
Weeks 8-12
Texture Refinement
Acne begins to clear. Skin starts looking more ‘glowy’ as cell turnover stabilizes.
Months 6+
Collagen Remodeling
Improvement in fine lines and hyperpigmentation. This is the long-term maintenance phase.
When to halt application?
If you experience “Retinoid Burn” (raw, weeping skin, severe stinging upon applying moisturizer), stop all actives for 7 days. Focus on Cica-creams and Petrolatum until the barrier closes.
Products Containing Tretinoin
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Curology
Custom Formula Tretinoin 0.01% Clindamycin 1% Azelaic Acid 4%
13 ingredients
CHEAPYXO
Miss Camaraderie’s Retinoic Acid Beauty Bar
11 ingredients
Medihealth
Betarretin Crema 0.025%
10 ingredients
Menarini
Tretinoin Gel 0.05%
11 ingredients
RETIN-A MICRO
Tretinoin Gel Microsphere 0.06%
13 ingredients
Viatris
Zalna Gel 10% 0.25mg
13 ingredients
Curology
Custom Rx (0.02% Tretinoin, 5% Azelaic Acid, 4% Niacinamide)
14 ingredients
Bausch Health
Retin-A Micro 0.04%
12 ingredients
Perrigo
Tretinoin Gel 0.025%
4 ingredients