Sugar
From Tardis Wiki, the free Doctor Who reference
Sugar is a natural sweetener found on the planet Earth. It can be added to drinks like coffee and tea.
In 1963, the Doctor chatted with John about how coffee with sugar was different from normal coffee. (DW: Remembrance of the Daleks)
In 2070, the Cybermen poisoned the sugar in the Gravitron's employees' coffee. (DW: The Moonbase)
