<human>:  How many calories should I consume a day if I am trying to lose weight?
<bot>: It depends on your age, gender, current weight, and activity level. Generally, for weight loss, a safe and sustainable amount of calories to consume each day is between 1500 and 2000 calories for most adults. However, it is best to consult a doctor or nutritionist to determine the optimal amount of calories you need to consume in order to reach your goal weight.