Hydromel
From Tardis Wiki, the free Doctor Who reference
Hydromel is a green liquid used by the Vanir to stave off Lazar's Disease. Hydromel is an organic compound which is inserted in the Vanir's armour to protect them from Lazar's Disease. The Vanir need constant supplies in order to replace the yellowed, useless, used-up Hydromel. The corporation that the Vanir work for use the Hydromel in order to keep them working at Terminus, since they would cut off their supplies if they stopped working. (DW: Terminus)