Not so much about bipolar, but about mood swings:

I have always been very moody, and suspected that I had a mild case of bipolar disorder. However, a psychologist and psychiatrist finally diagnosed me as having Generalized Anxiety Disorder - something I didn't even know existed.

I have found that magnesium supplements help mellow me out a LOT and I found out that magnesium deficiency is VERY common in the US.

You can get magnesium supplements at any health food store, or, GET THIS!

Hemp seed is super high in magnesium! It also has GLA (a type of omega-6 fatty acid that helps to regulate hormonal mood swings, like during menopause or PMS).

I want to stress that this is a super-effective nutritional supplement for anybody suffering from low-level mood disorders (and anybody who just feels stressed out sometimes).

I don't have much else to contribute but this has helped me so much, I thought I should share.