Eating habits and exercise routine are not the only factors that affect your weight. According to experts being stressed depressed or even the lack of vitamin D can be a reason for weight gain. Here are five common weight gain misconceptions. Pankaj Aggarwal from Delhi s Agrawal Homoe Clinic talks about the possible reasons that could hinder your weight loss or weight gain process. Chronic stress: Living with anxiety stress or grief causes your body to produce an excessive amount of cortisol a hormone that will make your body store fat especially around the waist. This type of weight gain