Pyrrole disorder is one you must absolutely consider in treatment resistant depression: Severe pyrrole levels have been observed in persons diagnosed with violent behaviors, depression, schizophrenia, and other serious mental disorders.
This brief video on the Walsh overmethylation - folate deficiency depression biotype [2 of 5] - will remind you of the the fact that depression is more than just an appearance of sadness.
Bill Walsh is a mind pioneer. This brief video on one depression biotype - undermethylation - [1 of 5] will likely whet your appetite on the fact that depression is more than just an appearance of sadness.