GMC-Registered · UK skin cancer specialist
Dermatologist's quick take
- Sunscreen is by far the strongest anti-ageing ingredient — 90% of visible ageing is UV
- Retinoids are the second-strongest — start in your late 20s for prevention
- Antioxidants (vitamin C, E, ferulic) prevent damage; peptides and growth factors repair it
- Don't waste money on collagen creams — collagen molecules can't penetrate the skin
- Track changes objectively — most progress is invisible without baseline photos
Anti-ageing skincare is one of the most over-marketed and under-explained categories in dermatology. Most of what people spend money on does nothing; what does work is cheap, well-evidenced, and ignored because it sounds boring. Here is the entire decade-by-decade framework I give my patients.
The 90/10 rule
Roughly 90% of visible ageing is from UV exposure (photoageing) and 10% is intrinsic (chronological). That means daily SPF is mathematically the most powerful anti-ageing ingredient — it's not even close. A 2013 study followed 900 adults for 4.5 years; the daily SPF group showed 24% less skin ageing than the discretionary-use group.
1. Daily SPF 30+
By far the most powerful anti-ageing tool. No exceptions.
2. Retinoid
Late 20s+. Prevention then treatment. Slow build-up.
3. Antioxidants
Vitamin C, E, ferulic acid. AM under sunscreen.
4. Repair signals
Peptides, growth factors, niacinamide. PM.
The decade-by-decade plan
20s — prevention era
Goal: prevent damage, not reverse it. AM: gentle cleanser, vitamin C 10%, lightweight moisturiser, SPF 30–50. PM: cleanser, moisturiser. Add retinaldehyde 0.05% twice a week from age 25–28.
30s — early intervention
Goal: maintain collagen, treat early pigmentation. AM: vitamin C, niacinamide, moisturiser, SPF. PM: gentle cleanse, retinoid 3 nights/week, peptide serum on rest nights, ceramide moisturiser.
40s — treatment era
Goal: stimulate collagen, treat established lines and pigmentation. Increase retinoid frequency to 4–5 nights/week as tolerated. Add peptides and consider growth factors. PM moisturiser becomes richer (ceramides + cholesterol + fatty acids). Consider in-clinic treatments (microneedling, light peels).
50s+ — comprehensive maintenance
Goal: support thinning skin, address volume loss, manage menopausal changes. Nightly retinoid as tolerated, daily peptides, possibly oestrogen-mimicking topicals (like genistein). Add HA-based sleeping masks. In-clinic treatments (RF microneedling, fractional laser, HIFU) become more relevant. Don't forget the neck, chest and hands.
Ingredients that work, ranked
Strongest evidence, in order
- 1. Broad-spectrum SPF 30+ daily — the foundation
- 2. Retinoids — tretinoin > retinaldehyde > retinol > retinyl esters
- 3. Vitamin C (L-ascorbic acid 10–20%)
- 4. Peptides — matrixyl, copper peptides, Argireline
- 5. Niacinamide 5% — barrier + pigmentation + redness
- 6. Growth factors (EGF, bFGF) — moderate evidence, expensive
- 7. Hyaluronic acid — temporary plumping, not anti-ageing per se
What to skip
Don't waste your money on
- Topical collagen creams (molecule too large to penetrate)
- Most stem cell creams (no live cells in any topical product)
- "24 karat gold" or other novelty actives — no clinical evidence
- Snake venom / bee venom peptides at hobby concentrations
- Most jade rollers and gua sha for actual anti-ageing (lymphatic drainage only)
- Oral collagen supplements at the doses sold in supermarkets
The lifestyle multiplier
No skincare product matches the impact of: not smoking, sleeping 7+ hours, managing stress (see how stress affects your skin), eating a Mediterranean-style diet, and limiting alcohol. These compound across decades. The single biggest difference between two people's skin at 60 is rarely the products they used — it's whether they smoked and how much sun they got.
Consistency
Daily routine for years > occasional intensive treatments.
Protection
SPF every day, even indoors near windows.
Lifestyle
Sleep, stress, diet and not smoking compound massively.
How to track results
Anti-ageing results are slow and easy to miss day-to-day. The two best metrics are: take a photograph in identical lighting every 4 weeks, and use ScanSkinAI's AI skin analysis for objective scoring of fine lines, pigmentation and texture. People who track see better adherence and better results — because progress is real and measurable, not subjective.
Monitor skin changes over time
Anti-ageing results are slow. Take a baseline photo with ScanSkinAI today — compare in 6 months.
Frequently Asked Questions
Sunscreen — yesterday, regardless of age. Antioxidants (vitamin C) — early 20s. Retinoids — late 20s for prevention, early 30s for treatment. Peptides and growth factors — 30s onward. There's no clinical benefit to starting before your 20s, and aggressive products on young skin can damage the barrier.
Topically, yes — after sunscreen. Forty years of evidence shows retinoids increase collagen production, accelerate cell turnover, fade pigmentation and refine pores. Prescription tretinoin is strongest; over-the-counter retinol is gentler. Retinaldehyde sits between them in strength and tolerability.
No. Collagen molecules are far too large to penetrate the skin barrier. Ingredients that boost your own collagen synthesis (retinoids, vitamin C, peptides, growth factors) work; topically applied collagen does not. Oral collagen supplements have weak evidence at best.
Useful for hydration but not for ageing per se. HA plumps skin temporarily by drawing in water — fine lines look reduced because dehydrated skin shows them more. The effect is real but temporary, and HA does nothing for actual collagen, elastin or skin structure.
Some are. Matrixyl (palmitoyl pentapeptide-4), copper peptides (GHK-Cu), and Argireline have moderate clinical evidence. They work slowly (12+ weeks) and are best stacked with retinoids and SPF. Don't expect miracle results from peptides alone.
All have evidence in the right hands. Red light LED (633 nm) supports collagen modestly with regular use. Microneedling at 0.5–1.5 mm depth boosts collagen significantly but should be done by a trained practitioner. Laser, RF microneedling and HIFU are stronger but need clinical assessment.
Dr. Celina Kazumi Iwasa
VerifiedGMC-Registered · UK Hospital + Private Practice · Skin Cancer Screening Specialist
Dr. Iwasa is a GMC-registered dermatologist working across UK hospital and private practice settings. She specialises in skin cancer screening, mole assessment and dermoscopy, with a focus on UK and European patients across Fitzpatrick I–IV skin types.