fasting plasma glucose test and the oral glucose tolerance test to determine if you suffer from diabetes your thyroid levels when was the last time you got your thyroid levels checked the thyroid gland which is located in the front of your neck produces hormones that are directly associated with your metabolism so when these hormones are all over the place it results in intense fatigue there are two types of disorders hyperthyroidism which means there is too much of the thyroid hormone and hypothyroidism which causes your metabolism to drastically slow down both types cause that feeling of being constantly tired and weighed down simple blood tests can pinpoint on whether you suffer form thyroid so get yourself checked you are depressed depression may be a mental ailment but manifests itself in the physical form too not only does it affect all the major areas of your life relationships eating habits work performance it can also wreak havoc on your energy levels while there is no particular test to diagnose depression dont hesitate to reach out to a mental health professional for help the faster you get treatment the quicker will be your recovery