I agree, it should be approached holistically. A lot of emotional issues are just symptoms or conditions caused by physical health conditions. Any example, I have Hashimotos disease (thyroid not producing enough hormone and it also can do what's called a thyroid storm, where you cycle between too much and too little thyroid hormone in your body) Well, one of the issues associated with this is mood swings. The reason is completely due to how much hormone is produced, if it's level your mood is, if it's low you have symptoms of low mood or depression, but if it starts producing too much, you will see mania and anxiety signs. When I used to do biopsychosocials at my old job and had a client with a bipolar or depressive diagnosis, when we would get to physical health section they almost always were diagnosed with thyroid disorder also. The hormone amount is also directly related to weight fluctuations.