Agree this "made up illness" has very real symptoms as I live in close contact with someone who has it. I've advised him to take iodine, we'll see how that goes. You can lead a horse to water...
Something else I've discovered that looks helpful is the herb rhodiola rosea. It's often used to help with ADHD.
Just started taking it myself, the Gaia Herbs brand. I don't have ADHD per se, but it seems like something that is very helpful for energy and higher-level functioning.
There's a book, The Rhodiola Revolution, that explains a lot about how it works.