It's very funny to me, being an ex fat body, how this debate continues and with such intensity. So just to add my experience in the subject with a little hint of science behind it. Eat less move more and whichever route you choose, IE lo carb, lo fat you have to maintain it over a duration of time. Drop out rates on diets are phenomenal for example looking at 4 diet methods of 160 overweight people (mean age, 49; 51% women; mean BMI, 35) to follow one of four diets: low-fat (Ornish), low-carb (Atkins), low-glycemic-load (Zone), or portion- and calorie-restricted (Weight Watchers). All participants attended four diet classes over 8 weeks to improve adherence, with no specific interventions thereafter. By 1 year, all diet groups had achieved only modest, albeit statistically significant, mean weight reduction (range, 2.1-3.3 kg), with no significant differences among the diets. In addition, benefits in LDL-to-HDL cholesterol ratio, triglyceride levels, and blood pressure were similar among the diets. The weight loss seen was significantly associated with improvements in total-to-HDL cholesterol ratio, C-reactive protein levels, and insulin levels, regardless of diet type. The greatest weight-loss and risk-factor benefits were observed among study completers (12-month completion rate, 58%). Completion rates trended lower with the Ornish (50%) and Atkins (52%) diets than with the Zone and Weight Watchers diets (65% each). Bottom line dietary adherence, which is generally low, yields the greater benefits. You all can debate til the cows come home on the trivial responses to lipid/insulin responses but in the end any compostion change for the postive improves these and I recommend the "low-fad" diet, eat less move more. P.S. We are the worrrrrllllldddd, we are the chillllllldren, come on now sing it with me....hey where'd the bouncing balls go? Hey do you guys see the bouncing balls? Oh my god, I lost my bouncing balls.