Tretinoin / Hydroquinone Peel

Physician-Directed Chemical Peeling for Pigmentation, Photoageing, and Skin Renewal

The Tretinoin / Hydroquinone Peel combines two of dermatology's most extensively studied active ingredients in a physician-directed chemical peeling protocol. This is not a cosmetic procedure — it is a clinically prescribed treatment with decades of peer-reviewed evidence supporting its efficacy for pigmentation disorders and photoaged skin.

Tretinoin, a first-generation retinoid, accelerates epidermal cell turnover and stimulates dermal collagen synthesis. Hydroquinone — the most well-studied topical depigmenting agent in dermatology — inhibits melanin production by blocking tyrosinase, the rate-limiting enzyme in the melanin biosynthesis pathway. Together, they deliver controlled epidermal renewal and targeted pigment regulation.

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Who is This Treatment For?

This peel may be suitable for adults presenting with:

• Melasma — hormonal or UV-triggered facial hyperpigmentation
• Post-inflammatory hyperpigmentation (PIH) following acne, eczema, or injury
• Uneven skin tone and discolouration
• Photodamage — solar lentigines, mottled pigmentation, and rough texture
• Fine lines and early photoageing
• Dull, rough skin texture requiring renewal
• Mild acne-related pigmentation

The treatment is not appropriate during pregnancy or breastfeeding, in the presence of active inflammatory skin conditions, or where known hypersensitivity to any component exists.

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The Science: How Does it Work?

Tretinoin — Cellular Renewal

Tretinoin binds to nuclear retinoic acid receptors (RARs) in keratinocytes, upregulating genes governing cellular differentiation and proliferation. This accelerates epidermal turnover, promotes shedding of damaged cells, and — at the dermal level — stimulates fibroblast activity and new collagen formation. The result is progressive skin renewal with improved texture and reduced fine lines.

Hydroquinone — Targeted Pigment Suppression

Hydroquinone competitively inhibits tyrosinase, reducing melanin synthesis at source. It also interferes with melanosome maturation and transfer to keratinocytes — delivering targeted, reversible pigmentation reduction suitable for supervised treatment protocols.

Synergistic Effect

Enhanced keratinocyte turnover facilitates elimination of melanin-laden cells, while concurrent tyrosinase inhibition suppresses new pigment production. This dual mechanism produces more comprehensive improvement than either agent alone.

What to Expect

1. Session length: 30 to 45 minutes.
2. Sessions: 3 to 6 sessions for pigmentation concerns.
3. Frequency: Every 2 to 4 weeks.
4. Downtime: Redness 1 to 3 days; peeling 3 to 7 days.
5. First results: Initial brightening within 1 to 2 weeks.
6. Full results: Significant improvement at 4 to 12 weeks.
7. Maintenance: Ongoing SPF 50+; maintenance sessions as advised.

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Risks, Preparation, and Aftercare

Side effects are generally temporary: erythema, dryness, peeling, mild stinging, and transient skin sensitivity. Post-inflammatory pigmentation changes can occur in susceptible individuals — particularly relevant in darker Fitzpatrick skin types — making careful patient selection essential.

Before treatment:

• Avoid excessive sun exposure for two weeks
• Discontinue retinoids and exfoliants as directed
• Ensure no active skin infections are present

After treatment:

• Consistent SPF 50+ is non-negotiable
• Use gentle cleansers and prescribed moisturisers to support healing
• Do not pick at peeling skin

When prescribed appropriately and combined with diligent photoprotection, this peel represents an evidence-based, cost-effective approach to pigmentation management that can achieve meaningful, lasting improvement in skin clarity and quality.