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Dear all, I confess that my recent immersion in nutrition science derived, besides an old personal interest, from the necessity not to call a dietitian. My wife in the past has gone to numerous dietitians and has lost and gained weight, yo-yoing several cycles. This time I imposed myself: no more money thrown to dietitians, I'm going to see to it. So I started with low-carb, since she had previously good results with it. Dr. Fung and Rosedale school, advocating low carb, hi fats, moderate protein (very moderate sometimes). No caps on calories but not unilmited fats. I attach a temporal plot (dates follow the European convenction, dd/mm/year). My wife started at 83.5 kg (BMI 31) and reached 77.5 kg (BMI=29) after 5 months. Then the long plateau. Very stable bodyweight, within the usual hi-frequency fluctuations. After 4 months of this plateau, I thought maybe a change might help. I had her adopt a caloric restriction scheme coupled to an Ornish-style diet, few fats, more carbs, protein enough to satisfy 100% or more RDA for essential AAs. She likes carbs better than fats so, even if 900 kCal day-1 is not much, she's enjoying her food. Moreover, I strongly suspect that her BMR is lower than the theoretical, mean index. She's most likely in the lower percentiles of the statistical distribution of energy requirement, so her 52% of theoretical restriction is something in the region of maybe 70% of real energy need. So, just after the shift, she started loosing weight again, now on a decreasing trend, like visible in the plot (presently at 75.8 kg, 28.5 BMI) . Interesting bottom line: After all it is not always true, like often told, that low-carb is the best way to loose weight and that calories are not a factor. It may be so at the beginning, since forcing a sudden decrease of the insulin signal will bring about strong diuresis and some catabolism. People like my wife though, who is a food-absorber, may reach soon an homeostatic balance and stop loosing weight. I also suspect saturated fats are a factor which, in genetical setups like my wife's, can boost lipidogenesis. I find the spectrum diet as suggested by Dr. Dean Ornish is pretty sensible and balanced. Low fat means more food volume, which is more satiating in a CR setup. I'm curious to see where this trend is leading.