Now that we've established how common it is to keep expired products, let's get into the nitty gritty: is it really that bad to use old makeup? I asked Dr Emma Wedgeworth, consultant dermatologist and British Skin Foundation
spokesperson. "The concern after the expiry date is that products may change composition [the way a mixture is made up] and therefore be more at risk of contamination from bacteria and moulds," she says. "By applying this to your face, you could be causing irritation or pore blockage," resulting in anything from itchiness to breakouts. Dr Wedgeworth adds: "If you already have a compromised skin barrier
[e.g. dry, scaly, irritated skin] or an existing skin condition, you are at a higher risk of infection or irritation." Especially in these instances, Dr Wedgeworth advises sticking closely to the expiry dates.