The Zelens Tea Shot Urban Defence Serum (£85) is a concentrated moisturising and antioxidant serum that contains five different types of tea: green, matcha, white, red, and black (as well as kombucha, which is a form of fermented black tea). The teas are rich in polyphenols and flavonoids (both antioxidants) that not only have anti-inflammatory properties but also help protect the skin from external stressors that can lead to premature ageing. It's a great serum to layer underneath your moisturiser and sunscreen for an extra layer of protection this summer.