For example, how much weight could you lose if you followed a 1,200 calorie (women) or 1,800 calorie (men) diet plan for two weeks, a month or six weeks?Or perhaps you are wondering how long it would take to lose 30 lbs on a liquid diet, Atkins or Weight Watchers.
Age. Your age plays an important part in determining your daily calorie requirements. According to the MayoClinic.com calorie calculator tool, an 18-year-old female with an active lifestyle and a height of 5 ft 5 inches requires 2,250 calories daily to maintain a weight of 160 pounds. At age 80 -- with the same height, weight and activity level
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