In order for her to start getting healthy, she needs to restart her diet. It is important that she gets all the macromolecules needed so she is able to function properly. She should also see a doctor or a nutritionist so they can help her get back on track and help provide some knowledge on how to eat the proper way. There are foods that may seem "unhealthy" to her, but in reality, it is actually important. A healthy diet can include foods you love, it is just that you should eat them in moderation. Eating foods with fat is a part of a healthy diet, but it is more important that you choose foods that provide good fats and balance the amount of calories you eat from all foods with amount of calories you burn. Aim to eat vegetables, whole grains, poultry, fish, nuts and more.