Their breeding world was lost, causing them to turn to the alien “Miss Foster” to create a new generation; she created a drug that would cause human fat (anatomically: ‘adipose tissue’) to parthenogenetically create baby Adipose, although they can convert bone, hair and muscle tissue in emergency circumstances (but making them ill). Ten thousand were spawned. The official Doctor Who website’s Monster Files feature states that the baby Adipose were taken into care by the Shadow Proclamation.
Young Adipose were hand-sized, marshmallow-shaped beings, composed almost entirely of fat. They weighed at least one kilogram, as Roger Davey, who used the Adipose pills, said it was the exact amount of weight he lost each night
Adipose technology included the pills used on Earth to germinate young Adipose, nursery ships equipped with levitation beams and sonic pens. ( “Partners in Crime”.) At one point the Adipose society had its own televised news media. (Cold Blooded War!)
A pink Adipose was present at Garage 10. (The Ministry of Time)
In a parallel world, the March of the Adipose occurred in the United States. Sixty million people were killed and converted into Adipose. (Turn Left)
BEHIND THE SCENES
Adipose is, in reality, fat tissue of the human body, which is what the Adipose are named after. The real adipose is mentioned in the scientific explanation Miss Foster presents.
The Mill made stress balls for themselves designed in the image of the Adipose. A version of these later became commercially available.
The computer-generated Adipose came in two forms. Adipose in the background of many shots were created with a form of artificial intelligence to prevent the need of having to individually animate each individual Adipose, but the ones in the foreground were hand animated.
Russell T Davies’ original concept for the Shadow Proclamation scene in The Stolen Earth included an appearance by several very large adult Adipose, as well as many Adipose children (likely those taken from the Adiposian First Family) but his plans to feature a “rogues gallery” of alien races in the scene fell through; ultimately the Judoon were the only returning race featured.
They also made a small appearance in The End of Time