Hi: My daughter has also a terrible temper. She is very sweet when she needs to be... and she is usually happy most of the day, but when she gets mad is like hell. When she doesn’t get her way she goes nuts and we have to send her to her bedroom. After a little while she comes with a better attitude. She is very competitive in everything and loosing is a big deal for her.  Her levels are ok. I think this problem is more profound that the basic hormone levels. A will think is more related to Epinefrin.