Chimeron jelly
From Tardis Wiki, the free Doctor Who reference
Chimeron jelly was a substance eaten by young Chimerons. It functioned in a similar way to royal jelly for bees.
Young Chimerons that were given Chimeron jelly from birth would develop into queen Chimerons. The jelly was stored in small syringes and given at regular intervals after the birth in order to supply hormones and nutrients.
Delta administered some jelly to the Chimeron princess, accelerating her growth. Billy ingested some jelly and was changed into a Chimeron. (TV: Delta and the Bannermen)
