The minimum number of calories you need depends on several factors, including your gender, weight goals and level of physical activity. A healthy diet emphasizes nutritional balance as well as appropriate calorie consumption. Set weight goals that align with a healthy body mass index and choose a calorie target that supports healthy weight loss or maintenance.
Significance
In general, men require more calories than women and active men and women need more calories than those with sedentary lifestyles. If you want to maintain your current weight, your minimum calorie target represents the number of calories you need for energy balance. An appropriate minimum calorie target for weight loss is one that supports a loss of 1 to 2 lbs. per week, according to MedlinePlus.
Identification
The National Heart Lung and Blood Institute recommends a minimum calorie intake of 1,200 for men and 1,000 for women who need to lose weight. Although these gender-specific minimums indicate a safe calorie target for most men and women, very active individuals may need more to support a healthy rate of weight loss. If you lose more than 2 lbs. a week after the first two to three weeks at this calorie level, increase your calorie target by 100 to 200 calories until you find a more suitable goal.
Considerations
Your activity level factors in to your minimum healthy calorie target. One method of estimating energy balance needs for active individuals who exercise aerobically five to seven times a week, for example, is to multiply weight in pounds by 20, according to the National Institutes of Health. Based on this formula, a 150-lb woman who exercises aerobically seven days a week needs approximately 3,000 calories daily to maintain her weight. In this case, a target of 2,000 calories would create a calorie deficit of 1,000 daily and support weight loss of about 2 lbs. weekly. To estimate calorie maintenance needs for less active and moderately active individuals, multiply weight by 14 and 17, respectively.
Potential
Choosing an appropriate calorie target based on your personal goals rather than published minimums promotes a healthy attitude toward food and exercise. Use the NIH formula to estimate how many calories you need to maintain your weight. Or utilize the calorie needs and body mass index estimator available on the Baylor College of Medicine website. If you need to lose weight, set your calorie target at 500 to 1,000 calories fewer than your maintenance target. Exercise also helps create a calorie deficit. Aim for five 30-minute sessions a week to help you reach your weight goal and improve your overall health.
Exceptions
In some cases, very low-calorie diets of 800 or fewer are appropriate to accelerate weight loss for individuals experiencing obesity-related health conditions, according to the Weight-control Information Network. Very low-calorie diets are only appropriate when prescribed and supervised by your doctor. Extreme caloric restriction leads to rapid weight loss, which can cause health problems such as gallstones, hair loss and bodily fluid fluctuations, according to Weight Watchers.
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