Evidence-Based Skincare Routines Between Treatments

Why Your At-Home Routine Matters

Professional aesthetic treatments are powerful interventions — but they represent only a fraction of the time your skin spends in any given year. Between clinic visits, your skin is exposed to 365 days of UV radiation, pollution, stress, and natural ageing processes. What you do at home between treatments determines whether you maintain, enhance, or undermine the results your practitioner has worked to achieve.

Evidence-based skincare — using products with ingredients proven effective in peer-reviewed clinical trials — is the foundation upon which all professional treatments are built. This guide outlines the most effective at-home skincare strategies to maximise the longevity and quality of your aesthetic treatment results.

The Core Four: Non-Negotiable Products

1. Broad-Spectrum SPF 50 Sunscreen

Evidence level: Very strong

If you could use only one skincare product for the rest of your life, it should be sunscreen. UV radiation is responsible for up to 80% of visible skin ageing (photoageing) and directly undermines the results of virtually every aesthetic treatment.

• What the evidence says: A landmark 2013 study in the Annals of Internal Medicine demonstrated that daily sunscreen use resulted in 24% less skin ageing compared to discretionary use over a 4.5-year period
• How to use: Apply two finger-lengths (approximately 1/4 teaspoon) to the face every morning as the last step in your skincare routine, 15 minutes before sun exposure. Reapply every 2 hours during outdoor exposure
• Product selection: Choose SPF 50 with broad-spectrum (UVA + UVB) protection. Both mineral (zinc oxide, titanium dioxide) and chemical formulations are effective. The best sunscreen is the one you will actually use consistently
• Treatment relevance: Protects collagen stimulated by microneedling, Profhilo, and RF treatments. Prevents hyperpigmentation after chemical peels. Preserves filler results by preventing UV-induced collagen breakdown around filler material

2. Retinoid (Vitamin A)

Evidence level: Very strong

Retinoids are the single most evidence-based topical anti-ageing ingredient available. They accelerate cell turnover, stimulate collagen production, reduce fine lines, improve skin texture, and regulate pigmentation.

• What the evidence says: Decades of research demonstrate that topical retinoids increase collagen types I and III production, reduce matrix metalloproteinase activity (collagen-degrading enzymes), and normalise pigmentation. A 2007 study showed histological improvement in collagen organisation after 12 months of tretinoin use
• How to use: Apply a pea-sized amount to the face every evening after cleansing. Start with lower concentrations (retinol 0.3-0.5%) 2-3 times weekly, building to nightly use and higher strengths as tolerated
• Strength hierarchy: Retinyl palmitate (weakest) → retinol → retinaldehyde → adapalene → tretinoin (strongest, prescription-only). Each step up represents approximately 10-20 times more potency
• Treatment relevance: Enhances collagen-stimulating treatment results, improves product penetration, maintains smoother skin texture between chemical peels, and supports the skin’s natural renewal process between professional treatments
• Caution: Pause retinoid use 5-7 days before and after chemical peels, laser treatments, or microneedling. Resume when the skin has fully healed

3. Vitamin C Serum (L-Ascorbic Acid)

Evidence level: Strong

Vitamin C is a potent antioxidant, a cofactor in collagen synthesis, and a tyrosinase inhibitor that reduces hyperpigmentation. It is one of the few ingredients with strong evidence for all three claims.

• What the evidence says: Clinical studies demonstrate that topical vitamin C at 10-20% concentration reduces wrinkles, improves skin firmness, brightens pigmentation, and provides photoprotection when used alongside sunscreen. A 2017 systematic review confirmed significant improvement in skin wrinkling, roughness, and pigmentation with regular use
• How to use: Apply in the morning after cleansing and before moisturiser and sunscreen. L-ascorbic acid at 10-20% concentration in a stable formulation (look for amber glass packaging, low pH, and the addition of vitamin E and ferulic acid for enhanced stability)
• Treatment relevance: Supports collagen synthesis stimulated by professional treatments. Provides antioxidant protection against the free radicals that degrade both natural and treatment-stimulated collagen. Helps maintain even pigmentation between peel sessions

4. Moisturiser

Evidence level: Strong

A well-formulated moisturiser maintains the skin barrier function that is essential for healthy skin and optimal treatment outcomes.

• What the evidence says: Skin barrier integrity is critical for preventing transepidermal water loss, protecting against environmental irritants, and maintaining optimal conditions for cell function. Compromised barriers impair healing and increase sensitivity
• Key ingredients: Ceramides (restore barrier lipids), hyaluronic acid (attracts and binds water), niacinamide (strengthens barrier, reduces inflammation), squalane (emollient protection)
• How to use: Apply morning and evening after serums. For drier or mature skin, use a richer formulation in the evening
• Treatment relevance: Maintains skin hydration that supports optimal healing after treatments. Strengthens the barrier to reduce sensitivity. Creates a healthy skin environment that maximises treatment efficacy

Evidence-Backed Additions

Niacinamide (Vitamin B3)

Evidence level: Moderate to strong

• Strengthens skin barrier function
• Reduces hyperpigmentation by inhibiting melanosome transfer
• Minimises pore appearance
• Anti-inflammatory properties benefit rosacea-prone skin
• Compatible with most other actives; well-tolerated at 5-10% concentration

Azelaic Acid

Evidence level: Strong (for specific indications)

• Excellent for pigmentation, acne, and rosacea
• Anti-inflammatory and antibacterial
• Safe during pregnancy (unlike retinoids)
• Available over-the-counter at 10% or by prescription at 15-20%

Alpha Hydroxy Acids (AHAs)

Evidence level: Strong

• Glycolic acid and lactic acid improve skin texture and radiance through exfoliation
• Useful for maintaining results between professional chemical peels
• Use 2-3 times weekly at home; do not combine with retinoids on the same evening
• Always follow with SPF the next morning

Peptides

Evidence level: Moderate

• Signal peptides like Matrixyl (palmitoyl pentapeptide-4) have some evidence for stimulating collagen production
• Copper peptides show promise for wound healing and skin rejuvenation
• Best as supplementary ingredients rather than primary actives

Sample Routines by Treatment Type

Between Botox and Filler Appointments

Morning: Gentle cleanser → Vitamin C serum → Moisturiser → SPF 50

Evening: Double cleanse → Retinoid (nightly) → Moisturiser

Weekly: AHA exfoliant 1-2 times per week (alternate evenings from retinoid)

Between Microneedling or RF Sessions

Week 1 post-treatment: Gentle cleanser → Hyaluronic acid serum → Ceramide moisturiser → SPF 50 (no actives)

Week 2 onwards: Resume retinoid and vitamin C gradually

Ongoing: Standard routine as above, pausing actives 5 days before next session

Between Chemical Peel Sessions

Week 1 post-peel: Gentle cleanser → Soothing serum (centella, aloe) → Rich moisturiser → SPF 50

Week 2 onwards: Gradually reintroduce retinoid and vitamin C

Week before next peel: Pause retinoid 5-7 days before

Ingredients with Weak or No Evidence

The skincare market is saturated with ingredients that lack robust clinical evidence. While not necessarily harmful, the following are not supported by strong evidence for their commonly marketed claims:

• Collagen creams: Collagen molecules are too large to penetrate the skin and stimulate collagen production when applied topically
• Snail mucin: Limited clinical data despite popularity; may provide hydration but specific anti-ageing claims are unsubstantiated
• Most plant stem cells: Plant stem cell extracts cannot integrate into human skin biology in the way marketing implies
• Gold-infused products: No evidence that gold particles provide any skin benefit beyond marketing appeal

Frequently Asked Questions

How long does it take for skincare to show results?

Most evidence-based actives require 8-12 weeks of consistent use before visible results appear. Retinoids may take up to 6 months for optimal collagen-stimulating effects. Sunscreen benefits are cumulative over years. Patience and consistency are more valuable than constantly switching products.

Can I use too many active ingredients?

Yes. Over-exfoliation and barrier disruption from too many actives is a common problem. Stick to the Core Four (SPF, retinoid, vitamin C, moisturiser) and add additional actives one at a time, monitoring for irritation. More products does not always mean better results.

Should I use medical-grade or high-street skincare?

The key difference is often concentration of active ingredients and formulation quality. Medical-grade products typically contain higher concentrations of proven actives (e.g., 15% vitamin C vs 1-2% in high-street products). However, some high-street brands offer effective formulations at lower price points. Focus on the ingredient list and concentration rather than the brand name.

Do I really need to double cleanse?

Double cleansing (oil-based cleanser followed by water-based cleanser) is particularly valuable if you wear SPF and makeup daily, as it ensures complete removal of these products. If you wear minimal products, a single thorough cleanse may be sufficient.

What is the most common skincare mistake after aesthetic treatments?

Resuming active products too soon after treatment. Retinoids, AHAs, and vitamin C should be paused for the period recommended by your practitioner (typically 5-14 days depending on the treatment). Applying these products to compromised skin can cause irritation, delayed healing, and potentially hyperpigmentation.