Update June 12th 2015: Addium replied to me directly after having a bad reaction, said they're updating their formula to remove Niacin which likely caused the reaction. Here's their comment:
I put this together super quick. Sorry for the bad presentation and stumbling through words, I was a little panicked while doing it because of the fairly intense bad reaction I had from taking Addium. My face and parts of my legs and arms became really warm, like sunburn, and my skin became red in those places. Very worrying and a clear negative side effect of Addium.
So, despite a good start to my Addium experiment, I obviously immediately discontinued taking it and absolutely cannot recommend it.
If you check out Addium reviews on Amazon, several people have reported getting rashes, so I'm assuming I've had a similar reaction.
Again, I'll do a full write up at shortly. My Addium review there is incomplete at the time of posting this. And full disclosure, I still have Amazon affiliate links on that site. While I absolutely do not recommend Addium, and will be clear about that in my review. I still make a small commission on other products people may buy if they click my Amazon link, so it helps pay the bills at the end of the month in return for doing this trial and hopefully sharing info that will save someone money and from experiencing the same horrible reaction.