"I think I must have a super-fast metabolism"

In this quote, Katie Price is revealing her belief that she has a very effective metabolic process. Metabolism refers to the chemical processes in the body that transform food into energy. A fast metabolism implies that the body is able to rapidly break down and use the energy from food. This can result in an individual being able to consume more without gaining weight. By saying she has a "super-fast" metabolic process, Price is implying that she has the ability to consume a lot and still preserve a slim figure. This might be viewed as a boastful declaration, as having a quick metabolism is frequently viewed as desirable in regards to weight management.