Changes in appetite and depression: causes and treatment

Changes in body mass index (BMI) have been linked to depression and may be the consequence of a number of factors, including the disorder itself, antidepressant side effects, changes in appetite and perspective toward food, and other psychological factors.
Changes in body mass index (BMI) and mood are closely linked; this relationship may go either way. Changes in a person's physique that result from a significant weight loss or gain may have an effect on the person's mental health. 
Depression has been linked to metabolic system changes, altered eating patterns, and increased body fat.
This article explores the correlation between depression and weight, as well as strategies for coping with both conditions.
Depression often brings about modifications to one's usual diet, eating habits, and appetite.
There are presently two distinct forms of depression recognised by researchers:
Type 1 is characterised by a lack of interest in eating, a decrease in weight, difficulty sleeping, and suicidal ideation.
Type 2 symptoms include weight gain, increased hunger, fatigue throughout the day, and a poor metabolic profile.
Individuals with depression may experience weight loss due to alterations in the brain's reward system, which may lead to a lack of interest or pleasure in eating.
Antidepressants may promote either weight loss or gain, depending on the individual using them. And other potential adverse effects of antidepressants, such as nausea and sleeplessness, may impact eating patterns and weight.
According to studies, obese people experience depression at twice the rate of normal-weight people. Researchers are still uncertain if obesity contributes to depression or whether sadness leads to fat.
Alterations in how the body reacts to stress might lead to mental health problems, including depression and weight gain.