Scientists now trying to use stem cells to generate brown fat cells to help speed up calorie burn. - Reuters (article link)

- Scientists in Germany and Switzerland found that an enzyme called COX-2 triggers development of fat cells to become brown fat, instead of white fat.
- Once activated by cold temperatures, brown fat burns calories faster than regular fat.
- Mice who were genetically engineered to produce high levels of COX-2 burned energy faster and were protected from obesity.