Monster Files: Adipose

The Adipose were seen in the episode "Partners in Crime". In the story, their breeding world was lost, causing them to turn to the alien "Miss Foster" to create a new generation. She formulated a drug that would cause human fat (anatomically: 'adipose tissue') to parthenogenetically morph into Adipose children.

This process is completely harmless to the host beyond the loss of body fat. In an emergency situation the process can be accelerated by using the host's bone, hair and muscle tissue as well as fat, but this makes the Adipose ill and weak, and kills the host by completely using up their body.