This is a very important discovery for me because the part of bipolar disorder I detest is the irritable depression that occurs with mixed state. It is the rattlesnake part of my disorder. The more I learn about it, the better I can manage and reduce it. For instance, I started taking Vitamin D3 and Magnesium supplements because deficiency in these minerals is linked to depression. I have been diagnosed as vitamin D deficient in the past. Hypomania is fine but not irritable depression. It causes me to snap at loved ones which leads to a horrible guilt. It is a nasty cycle. I hope this article helps those who havent figured out that depression does not only present as a sadness but can present as anger as well. Click on the link below for more information.