Calories are energy sources that essential the body. You should consume half of the total calories lost post workout. For example, if you exercise to burn 300 calories, you should consume 150 calories for your next meal. This will not affect your weight loss goals.
Better results you should start eating within 20 to 30 minutes after a workout your routine.
Here are a list of healthy snacks to eat after a workout to lose weight, then a low calorie snack is a great option.