My grandmother is probably bipolar, my sister shows signs of it. I thought I was myself but after I changed my diet to a perfectly balanced, sugarfree health diet with only fish, rice, vegetables, fruit, sugarfree hard bread and tea, I haven't had any bipolar type swings.
Back before, I could get into really manic episodes where I started off having one glass of wine but ended up drinking the entire bottle while playing the same song over and over on repeat and feeling completely grandiose, as if the entire universe evolved around me.
When I landed, I usually just wanted to crawl into a dark, underground cave and dissapear, cease to exist.
The change of diet really changed things. I never have insane ups or downs now, just a neverchanging existential void.