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This study, (in conjunction with previous studies it cites) suggests that de novo lipogenesis (production of body fat from excess dietary carbohydrates) begins within six hours. The actual rate is related to dietary macronutrient balance, with a greater amount occurring in people with very low-fat diets (this was not…
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Because of the First Law of Thermodynamics, it is actually that simple. At macroscopic scales over all but the shortest periods of time, energy (or matter - it's ultimately the same stuff changing forms) can't be created or destroyed. Expending more energy than you absorb and not losing weight or expending less energy than…
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You don't say how tall you are, but it looks like you might be consuming fewer calories per day than your basal metabolic rate (you look to be taller than 4 feet in your photo, which is how short you would have to be at your weight and age for a BMR of 1400 kcal a day). That's not generally a healthy or especially…
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Could be some combination of scale accuracy issues and sweat lost during the shower. Underwear isn't going to make more of a difference than the error range of most home scales (unless you have a medical-quality balance that you regularly validate against reference weights), though a full outfit can indeed weigh several…
