You have to make obesity treatment actually pay off at the corporate level. I would suggest taking a company’s obese diabetic patients and giving them free food that follows the Joslin Diabetes dietary guidelines (virtually identical to the Zone Diet). Then you get an approximate 14:1 return on investment. The less metabolically compromised the employee, the lower the return on investment. The worst economic choice is to build a corporate gym as the lean employees will be the primary ones using it.