For those who don't like oils or who have oilier skin, Dr Hudson-Peacock recommends the SkinCeuticals retinol range.
"Again, start on the lower strength — the Skinceuticals Retinol 0.3 (£65) — and work your way up as tolerated," he explains. "I advise using a pea-size amount for the whole face after washing and drying in the evening about half an hour before going to bed and using a moisturiser just before bed, if the patient prefers to do that as well. If the patient is a bit more sensitive, using a moisturiser in this way can contribute to reducing this in a pre-emptive way."