Most people with sensitive skin tend to avoid glycolic acid. However, used in the right formula and alongside the right mix of ingredients, it can actually be a real saviour to help strengthen the protective skin barrier over time. Formulated with over 85 percent natural origin ingredients, the Caudalie Glycolic Peel (£22) is a good entry point. It works as both a scrub or a peel, exfoliating and brightening up dull skin all at once. While it is a very effective 10-minute treatment, it's still super gentle and won't irritate your skin.