So instead of having starch, which is the food of plants, it takes something rather similar to brown fat and burns it at such a rate that it's burning fat, metabolizing, about the rate of a small cat.
En lugar de tomar almidón, que es el alimento de las plantas, usa algo semejante a una grasa parda para quemarla a un ritmo tal que consume la grasa, la metaboliza, como al ritmo de un gatito.