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Professional or cosmeceutical formulations are high end, but they have additional active ingredients that work together to reduce the appearance of ageing skin.

1. Ideal as a first retinol, this product is suitable for all skin types, even sensitive. It’s formulated to combat signs of premature ageing and renew the skin’s tone and texture without irritating it. Retinol Complex .25, $99, Skinmedica.

2. This milder serum will ‘plump’ the skin while refining and improving the appearance of its clarity, texture, hyperpigmentation and imperfections. Ultra A Skin Perfecting Serum Mild, $104, Ultraceuticals.

3. Get the works – brighter‑ looking, smooth, firm skin – with a cream that protects against free‑radical damage and has lactic acid and vitamin A derivatives to optimise cell turnover. Revise‑a, $104, DMK.

4. If you want 0.5% retinol, the clever technology in this product allows for a controlled‑ release delivery system, which enables deeper penetration and optimal results. Overnight Retinol Repair, $135, Dermalogica.