By all medical definitions that you'll find, I have what can either be referred to as ADD or AADD (Adult Attention Deficit Disorder), depending on whether you prefer to use the subcategories.
I know for a fact that none of the symptons are induced by sugar or caffeinne, for the simple reason that I've shown the symptoms since before I was a sweet-tooth or serious drinker ot caffeinnated drinks.
Distractability? I am frequently unable to force myself to do something unless I -really really- want to do it... the number of times I've sat down to do work and been unable to, nigh-on tearing out my hair for my inability to focus... too many times to count.
Forgetfulness and lack of organisation? That's pretty much the story of my life since I was about 6 or 7. It gets so bad that I'll often ask someone a question, and then have absolutely no memory of it a matter of minutes later and ask the same thing again (just ask Kershan, Baldilocks, or anyone else here in Lincoln, I do it all the time and have no recollection of it)
I've driven myself crazy sometimes over these problems with myself, and I'm sorry, but anyone who says it isn't some mental condition is a fool. I know a couple of certified-ADD people, and I am worse than them by quite a margin in pretty much every way. Sure, ADD/ADHD may have become a label too freely used as an excuse, but I either genuinely have it or something pretty much identical but by a different name.