Determining how many calories you need depends on your fitness goals, whether you are a marathon runner or a weightlifter. Use intake formulas to calculate your needs for muscle gain or sustainable weight loss.
Daily caloric intake should provide enough energy for your body to function when it is at rest, digesting food and performing physical activity. To maintain your weight, you must consume no more or fewer calories than your body burns each day through exercise and basic functioning.
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Diabetics must monitor their diets carefully to keep blood-sugar levels under control and prevent complications. As with healthy adults, a diabetic's caloric needs depend on gender, weight and physical activity level. If you have diabetes, discuss your calorie and nutrition requirements with your doctor or dietitian.
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