The Interleukin Genetics Company has a test that shows whether people will do better on a low fat or low carb weight loss plan.  The Company says our DNA controls how we burn and store calories from various foods and claims their test sorts out this information.  Independent studies of the test found that people on diets matched to their genes lost five times more weight than those on mismatched diets.  The test costs $149.00.  You take a simple swab inside your cheek to collect the DNA, send it back to their lab where they process it.  Then they send you a personalized report telling you what kind of diet and exercise program you should be on.  You can find out more at their web site www.inherenthealth.com. Sounds intriguing.  I would be interested in feedback from anyone who tries this.