If organ systems failed to work together your body would not work because your heart pumps blood in order for your whole body to work.
Anorexia and bulimia are life-threatening conditions that should not be overlooked.
Anorexia and bulimia are both definitely life-threatening conditions. Bulimia is where somebody tries binges and then purges to try and prevent weight gain. Anorexia is where people progress through extreme weight loss. The condition is certainly life-threatening considering the person suffering usually refuses to eat or only eats a little calories. Anorexia nowadays is contemplated as 'starvation'.
Eating sugary foods once in a while.
This is balance