Can stress make u lose weight? all tests have come back good. i was very sick with h plori and under a lot of stress, still stressed. not eat well

Body mass=food used: to build brain, muscles, bones, etc + stored (nearly all excess converted to fat, visceral&subcutaneous, since we are water based creatures http://goo.gl/Syte0r). When consume less food (as energy that we are able to absorb&use) then we burn body fat, converting it into glucose, proteins, etc. so as to stay alive (maintaining brain, muscles, movement) & body fat/wt. goes ↓. https://goo.gl/qrTDRq.

Weight loss: Depression and stress can suppress appetite and result in weight loss . Though infection with H pylori causes reflux of acid , vomiting and this can result in weight loss too .