As a plant based health coach, I provide information and education about living healthy on a plant based lifestyle. Reducing your calories to under 1200 a day is not sustainable long term. Eliminating carbs is not sustainable long term. You should be physically active as well as eat a nutritiously balanced diet. Eating plant based all the time will provide you with key nutrients and energy. You should not consume processed junk foods and you should consume adequate amounts of clean water. http://nutritionstudies.org/whole-food-plant-based-diet-guide/