This is what we were giving to read when I went to my first class - just thought you might like to read it.......... Determining a safe minimum amount of daily calories can be difficult however extreme restriction of consumed calories can significantly slow the metabolic rate and hinder your weight-loss goals - you shouldn't send signals to your body to conserve calories by detoxing or fasting. It is recommend that women should eat at least 1200 cals per day. The reason that the metabolic rate slows with prolonged dieting of less than 1,200 calories per day is a chain reaction of physiologic responses to the stress associated with such a restricted diet. Your body initially adapts to the stress of low caloric intake by engaging the "fight or flight" stress response, which has several negative consequences, despite you seeing lower numbers on the scale. The "fight or flight" response stimulates the breakdown of muscle in order to supply the body with enough fuel (glucose) to maintain the blood sugar levels in the absence of sufficient dietary calories. This "fight or flight" stress response will eventually wear out, thus slowing the metabolic rate to compensate for what the body perceives as starvation. There are three guidelines to safe and effective weight loss: aerobic physical activity, gradual changes in eating habits to encourage a lifestyle change, and a slow weight loss of one to two pounds per week.