I'm looking at taking the alpha brain supplement, are there any dangerous/illegal chemicals in it?

Everything has risk. Though I don't see anything illegal, any chemical that alters neurotransmitter levels can be dangerous or carry side effects. As I am not very familiar with a-brain, I can only say "take such things at your own risk." if you are concerned about fatigue or brain fog and the like, there are many other things to consider as well. I'd make an appt to talk with a holistic-minded doc about your concerns.