Four things that make you fat

Lack of vitamin D
Lack of vitamin D can lower the metabolism rate thus storing fat.

Sleepless nights
Studies show that the lack of sleep has an effect on the appetitite hormones and the metabolism slowd down when there is lack of sleep. Hence try to sleep for atleast 7 hours a day.


Stress
Due to flight or fight response, the body goes into survival mode that turns down metabolism and hence fat is accumulated.


Medications
studies prove that taking anti-depressant leads to weight gain.