I have always been a skinny person, in fact when I was a teenager I was so skinny that I didn't start to menstruate until I was 17. The same low weight persisted throughout my life and I loved to eat! until 2 years ago when I suddenly jumped from 8 stone 4 lbs to 11 stone in 6 months, my diet and exercise patterns had not changed, I have eaten organic foods for 15 years. I recently had a very heavy cold and didn't eat solid foods, only drank liquids for a week, I lost 0 ounces, in my previous state of slimness, in the same circumstances I would have dropped half a stone in a week. My friend has also gained weight unexpectedly around the same time as I did and we regularly give each other colds etc as we hang out together a lot. I am deeply suspicious that other factors are at play and more research is needed into the root cause of sudden weight gain. when I visited my GP he simply looked bored and said "its your age" he's such a comfort when you feel so exhausted and everything aches with the additional weight . It is a comfort to know that there are others who have experienced the same thing, I was beginning to feel like it was just that I was overeating, and therefore my fault, causing food to become my enemy, not something I have enjoyed my whole life. Medical bods, get some reasearch done.