The Complete Guide to Chemical Peel Protocols

Having proper protocols in place is essential for delivering consistent, safe, and effective chemical peel treatments. This guide covers the step-by-step procedures for the five most commonly performed professional chemical peels, from pre-treatment preparation through post-care management.

Pre-Treatment Preparation

Regardless of the peel type, proper pre-treatment is critical for optimal results and minimizing complications:

• 2-4 weeks prior: Begin a home-care regimen with a gentle AHA cleanser and low-concentration retinol to prime the skin for better acid penetration.
• 1 week prior: Discontinue retinoids, benzoyl peroxide, and any exfoliating products.
• Day of treatment: Skin should be clean, dry, and free of makeup. Document skin condition with photos. Review consent forms and confirm no contraindications.

Glycolic Acid Peel Protocol

Glycolic acid is the workhorse of professional peels. Its small molecular size ensures rapid, even penetration.

1. Cleanse: Double-cleanse with a degreasing cleanser. Pat dry completely.
2. Prep: Apply pre-peel prep solution (70% isopropyl alcohol or acetone) to remove residual oils.
3. Application: Using a fan brush or gauze, apply glycolic acid solution in even strokes. Start with forehead, then cheeks, chin, nose. Avoid the periorbital area.
4. Timing: For 30% concentration, start with 2-3 minutes. For 50-70%, start with 1-2 minutes. Monitor for erythema and patient comfort.
5. Neutralize: Apply sodium bicarbonate neutralizing solution. The fizzing indicates active neutralization.
6. Post-treatment: Apply soothing serum, barrier cream, and SPF.

Lactic Acid Peel Protocol

Lactic acid is an excellent choice for sensitive skin, first-time peel patients, and those with drier skin types due to its humectant properties.

1. Cleanse and prep: Same as glycolic protocol.
2. Application: Apply in even layers. Lactic acid has a slower onset, so patients may not feel tingling immediately.
3. Timing: 3-5 minutes for 30-50% concentration. Can be layered for increased intensity.
4. Neutralize: Water neutralization is sufficient for lactic acid peels.
5. Post-treatment: Hydrating serum followed by barrier cream and SPF.

Salicylic Acid Peel Protocol

Salicylic acid is self-neutralizing, making it one of the safest professional peel options.

1. Cleanse and prep: Standard protocol. Extra attention to degreasing for oily skin types.
2. Application: Apply in thin, even layers. A white precipitate (pseudo-frost) will form as the alcohol base evaporates. This is normal and not a true frost.
3. Timing: Self-neutralizing. Leave on for 3-5 minutes or until pseudo-frost forms uniformly.
4. Remove: Gently remove with cool water or damp gauze.
5. Post-treatment: Calming serum, light moisturizer, SPF.

TCA Peel Protocol

TCA peels require more experience and careful monitoring. The frosting response serves as a clinical endpoint.

1. Cleanse and prep: Thorough degreasing is critical for even penetration.
2. Application: Apply with cotton-tipped applicators or gauze for precise control. Work in small sections.
3. Frost monitoring: Level I frost (light, streaky white) for superficial results. Level II frost (solid white with pink showing through) for medium depth. Never push to Level III frost (solid white, opaque) unless specifically trained.
4. TCA is self-neutralizing: Do not apply a neutralizing agent. The reaction stops when the acid is consumed.
5. Post-treatment: Cool compresses, hydrating serum, occlusive barrier cream. No SPF on day one; begin SPF on day two.

Jessner's Solution Protocol

Jessner's solution (14% lactic acid, 14% salicylic acid, 14% resorcinol in ethanol) provides a balanced, medium-depth peel with excellent safety profile.

1. Cleanse and prep: Standard degreasing protocol.
2. Application: Apply 1-3 coats, allowing each coat to dry before applying the next. Each additional coat increases depth of penetration.
3. Endpoint: Even erythema with possible light frosting after 2-3 coats.
4. Self-neutralizing: No neutralization needed.
5. Post-treatment: Soothing serum, barrier cream, SPF beginning day two.

Neutralization Techniques

Understanding when and how to neutralize is crucial for patient safety. Only glycolic acid and some lactic acid peels require active neutralization. TCA, salicylic acid, and Jessner's are self-neutralizing.

For glycolic peels, keep a sodium bicarbonate solution (2 tablespoons in 8 oz water) prepared and within reach before beginning the peel. If the patient reports excessive burning or you observe rapid, intense erythema, neutralize immediately.

Series Scheduling and Progression

Chemical peels are most effective when performed in a series:

• Superficial peels: Every 2-4 weeks, series of 4-6 treatments.
• Medium-depth peels: Every 4-6 weeks, series of 3-4 treatments.
• Maintenance: Monthly or bi-monthly superficial peels after completing the initial series.

Progress gradually. Start new patients with a lower concentration and shorter contact time, then increase in subsequent sessions based on skin response.