Best… overall serum
L’Oréal Paris Age Perfect Cell Renew Midnight Serum, £29.99, Boots
Antioxidants including vitamin E and an ingredient derived from bitter orange peel help to reinforce the skin barrier, kick-start sluggish cell renewal and protect cells from oxidative stress. The serum is on the thicker side, which makes it easy to apply from the pipette, and it absorbs instantly. From the first application,