Intermittent fasting does allow you a little wiggle room in your diet, which is why people love it so much. But a person cannot survive on ice cream and pasta alone (even though he or she may want to!). Be sure to get a balance of protein, healthy fats, fibre, and complex carbs. This will satiate you longer so you eat fewer daily calories. If you eat sugar and refined carbs, you'll end up feeling hungrier and eat more than you need, which will leave you feeling bloated and sluggish. A balanced diet will help you build muscle, maintain a healthy brain, and make you feel more energetic and happier overall.