Go and get some fish oil ASAP. Taker two capsules a day. Nordic Naturals or Carlsson brands are two reliable good-quality brands that most health food stores carry.

There are good studies on the use of fish oil in bipolar depression:

http://www.ncbi.nlm.nih.gov/pubmed/21939614

Thyroid disease is more common in families with bipolar disorder. Hemochromatosis is a genetic condition (present in about one out of two hundred people) that causes excess iron to accumulate. Mostly it causes arthritis, type two diabetes, heart disease, hormone imbalances - but it can also sometimes cause bipolar, it seems - at least thwere are case reports of bipolar patients with hemochromatosis getting better when their iron levels are reduced through blood donation.