Well, that doesn't sound like a very healthy diet! Your body needs nutrients to function and stay healthy, and 600 calories of food just can't do that. You can take thousands of calories daily and still not get the nutrients you need if you're not eating the right things.
What do you drink? If you cut out high-sugar and high-fat drinks like sodas, cappuccinos, etc., you'll have much more leeway with the leftover calories to get an acceptable balance of carbs, proteins, and healthy fats.
Water may take some getting used to, but it's sooo much better for you than other choices. You can make tea or use crystal light to switch things up. Even fruit smoothies made with just fresh or frozen fruits and yogurt are tasty and nutritious.
Give those a try and try to fill your meals with more substance--fruits, veggies, lean meats, beans, nuts, etc.
Try out what april_mae said... I bet you'd feel a lot more energized throughout the day! Vitamin dificiency can cause a lot of long-term issues and can make your immune system plummet. Be careful, this is the only body you get! Skinny or fat, healthy is what's important!
Which foods are high in both fat and calories?
Foods that are high in both healthy fat and calories are all nuts, nut butters, seeds such as sunflower seeds, oily fish (salmon, sardines... Read more

