We’ve told you before about brown fat, the helpful kind that torches kilojoules.

Researchers at the Dana-Farber Cancer Institute have isolated new cells – beige fat – with nearly the same blubber-busting power of their brown cousins. Beige cells hide among white fat cells under your skin and switch between storing fat and burning it.

Preliminary research suggests that a muscle hormone  linked with exercise may turn white fat into beige, but more study is needed.