5 OF THE BEST GLYCOLIC ACIDS

Alpha H Liquid Gold

£33.50, marksand spencer.com A LEAVE-ON liquid to use twice a week at night, this improves the look of skin overnight.

Pixi Glow Tonic

From £10, pixibeauty. co.uk WITH 5 per cent glycolic acid, this popular ‘acid toner’ peps up the complexion.

Superdrug Naturally Radiant 5% Glycolic Tonic

£5.99, superdrug. com AN IDEAL way to start using glycolic acid — and a complete bargain.

NeoStrata Foaming 18% Glycolic Wash

£23, skincity. co.uk A CLEANSER that is both foaming and acid-based? It works — and this is one of my favourite face washes.

Dr Levy Switzerland 3 Deep Cell Renewal Micro-Resurfacing Cleanser

£39, cultbeauty. co.uk EXPENSIVE, but this can also be used as a treatment mask and lasts for ages.