Not eating enough calories in a day..

What are empty calories?
Also, what helped me was I stopped buying low-fat foods, and just bought the full fat instead.

stuff that offers no other nutritional value (vitamins, protein etc etc) only calories

How is that even possible?

Soda.

If the soda has carbs, it has *some* nutritional value in terms of macros. If it has no carbs, it's likely to have no calories (I've yet to see a soda with zero carbs AND a caloric value), and is therefore disqualified from "empty calories" as well.

Are there more nutritionally dense ways to get those carbs? Yep. That doesn't make soda devoid of all nutritional value, though.

I am the same way, I don't like to eat three meals a day. Everyone I know gives me a lot of grief over it, but that is just how my body is. I get busy with school work, kids, and other things and I completely forget to eat. I don't even have time workout until the end of the day when my kids are in bed. So I really don't think eating one meal a day is bad for you, I do light snack during the day. For instance if I get hungry during the day I will pull out a light and fit greek yogurt and eat that, I also take supplements from gnc for weight loss, that might also contribute to the loss of appetite, and I drink one or two cups of coffee a day. So it all depends on what you eat, it really doesn't matter when you eat it. One thing to keep in mind that has opened me up to eating and watching what I eat and how much I eat is the fact that if you are giving your body one meal a day to gain all the nutrients it needs, then its going to absorb that whole meal. If you eat three meals a day your body has three meals to gain the nutrients it needs to keep you strong and healthy and throws away the fats and the sugars that it doesn't need through your metabolism, but if you are only eating one meal a day its going to take that meal and store it all, not allowing your body to really throw away what it doesn't need. There is a whole logic into this and I have to say I think it's right. I went through a stage with my husband to help me eat more and it worked. It started with three peanut butter sandwhiches a day and that immediately made me lose weight and then also after i worked out i used epic isolate vanilla in a blender with some berries a yogurt and some skim milk and drank that once a day then a peanut butter sandwhich then dinner and seriously I dropped about two pounds or more a week. So my advise is to try to eat a couple more meals, even if they are small, it really does make a difference.

You know what happens when you don't eat enough calories? You lose weight faster.
As long as you don't feel sick, or weak, then you are fine. Listen to your body.

You know what happens when you don't eat enough calories? You lose muscle faster.....

Fixed it for ya....

OP (and others)--don't listen to this post. Listen to the people telling you to use your common sense, and do what feels right for you. You are not going to go into "starvation mode" and wake up one day with all muscle gone because for a couple months you ate 1000 net calories instead of 1200.

Not if you have a lot to lose.. The OP does not. YOU can "starve yourself" for a while with no bad effects, SHE needs to eat.