Hi there, Among other things, nicotine reduces the appetite, so smoking might be seen as beneficial by someone with anorexia. Scientists have noticed smoking effecting some people in different ways whether there are eating regularily or not (some had periods of not eating at all for several days). The only difference it was noticed that during those period of not eating, they got very nauseous when they smoked on a completely empty stomach, so much that one did never ever would have taken more than one drag on the cigarette (so not much of the bad stuff in the cigarette would have had the chance to enter their system). They had to at least drink a glass of water first. If someone isn t eating much, I imagine the effects of smoking, not even long term, might be worse for them. I mean, if your body is working extra hard because it doesn t have the food/energy it needs, then putting smoke in your lungs would probably be an even worse thing to do than it already is for healthy people, right? That s my logic, anyway This might be different for someone who never has smoked before, especially when they smoke their first cigarette by doing very deep drags. That might very well make you lightheaded and/or queasy. Not so sure if it would be enough to actually faint though. Ponder over those thoughts and decide you still want to continue smoking. Exercise regularly, get the junk food out of your diet, smoking and junk thoughts from thinking and eat a balanced regular diet. You will do well. With Best Wishes. Dr Anil Grover, Cardiologist M.B.;B.S, M.D. (Internal Medicine) D.M.(Cardiology) http://www/healthcaremagic.com/dr-anil-grover/63370