Skincare Ingredients That Actually Work — A Dermatologist’s Guide

Last updated: 5 March 2026

The skincare industry is saturated with products making bold claims, but which ingredients have genuine scientific backing? Our clinical team at Axiom Aesthetics on Harley Street separates evidence-based actives from marketing hype.

The Proven Heroes

Retinoids (Vitamin A Derivatives)

Retinoids remain the most extensively researched anti-ageing ingredient in dermatology. They accelerate cell turnover, stimulate collagen synthesis, reduce hyperpigmentation, and regulate sebum production. Start with a low concentration (0.025%) and gradually increase to minimise irritation.

Vitamin C (L-Ascorbic Acid)

A potent antioxidant that neutralises free radicals, brightens skin tone, and boosts collagen production. Look for formulations containing 10–20% L-ascorbic acid at pH 2.5–3.5 for optimal absorption. Store in dark, airtight containers as it oxidises rapidly.

Niacinamide (Vitamin B3)

Remarkably versatile, niacinamide strengthens the skin barrier, reduces redness and inflammation, minimises pore appearance, and regulates oil production. Well-tolerated at 2–5% concentration by virtually all skin types.

Sunscreen (SPF 30–50+)

Arguably the most important product in any skincare routine. UV radiation accounts for approximately 80% of visible skin ageing (photoageing). Broad-spectrum SPF 50 applied daily is the single most effective anti-ageing intervention available.

Highly Effective Supporting Ingredients

• Hyaluronic acid: Holds 1,000 times its weight in water — excellent for hydration
• Alpha hydroxy acids (AHAs): Glycolic and lactic acid for gentle exfoliation
• Ceramides: Essential for barrier repair and moisture retention
• Peptides: Signal skin cells to produce more collagen
• Azelaic acid: Anti-inflammatory, brightening, effective against rosacea
• Tranexamic acid: Emerging star for melasma and hyperpigmentation

Building an Effective Routine

Morning

1. Gentle cleanser
2. Vitamin C serum
3. Moisturiser with niacinamide
4. SPF 50 sunscreen

Evening

1. Double cleanse (oil-based then water-based)
2. Retinoid (alternate nights initially)
3. Hydrating serum (hyaluronic acid)
4. Moisturiser with ceramides

Our Harley Street team can prescribe medical-grade formulations tailored to your skin. Book a skincare consultation at Axiom Aesthetics.

Medical Disclaimer: Individual skin responses vary. Patch test new products. Consult a dermatologist for persistent skin concerns. Reviewed by the Axiom Aesthetics Clinical Team, February 2026.