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The low-dopamine hypothesis for ADHD is a legitimate idea still being actively studied.

> legitimate idea still being actively studied.

Yes, but it is not conclusive.

I for one believe there are multiple types of ADHD. Be it lifestyle induced, lead-exposure induced, TBI induced, genetic, etc.. Us humans like to slap labels on things, but life is rarely so cut and dry.

And you forgot maybe the most important, common and often overlooked one: ADHD that is emotional trauma-induced.

Hmmm, I know (C)PTSD can have issues that seem similar to ADHD, but then again, all these disorders are just a collection of symptoms slapped together. Is cyan a hue of blue or a hue of green -- does it even matter?

The only issue I have with emotional trauma-induced ADHD, is that it's very easy to be a chicken vs. egg issue. I have ADHD, and I experienced what I would consider emotional trauma to some degree (often because of ADHD), but which came first? It seems very cyclical to me.

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