Hello some causes are commonly heavy metal toxicity and other toxins (environmental), mold, nutrient deficiencies, and some other factors. As far as what to do, below are some recommendations but must be confirmed by the patients doctor before taking.
- Magnesium glycinate
- folate Bcomplex (especially B6)
- High quality fish oil/SPM
- Homeopathics (have to work with a homeopath for special recommendations but they can be very effective)
- Heavy metal detox
- mold detox
- liver detox
- Pure Encapsulations brain reset
Hope this helps! let me know if you have further questions!