Obesity is often caused by overeating. It can also be caused by improper hormone production or other malfunctions of various brain structures, including in particular the hypothalamus (site of the reward pathways, [this action=release of serotonin=feeling of pleasure]) and thyroid gland. | Obesity is often caused by overeating. It can also be caused by improper hormone production or other malfunctions of various brain structures, including in particular the hypothalamus (site of the reward pathways, [this action=release of serotonin=feeling of pleasure]) and thyroid gland. |