That was the wrong link - I've so many studies booked marked I'm up to my eyeballs (ADHD doesn't help), posting before sleeping isn't helping I can link various studies but its not really the point or the cure. Anyhow I'm not saying that caffeine is behind or the cause of illnesses but it may mimic just about any serious psychiatric disorder (bipolar, schizophrenic, ADHD in particular, dysthymia is probably ongoing intoxication and deficiency states sometimes alleviated by good diet or lifestyle) or certainly worsen them in people whom are allergic to the substance, or those whom are highly intolerant to it yet continue to intake it daily. It accumulates and at toxic levels caffeine is capable of anything in the brain which is a well known fact noted in countless abstracts and studies. Wipes out NMDA functions, glycine may as well be hooked up to strychnine pump etc etc.
Caffeine is probably like red wine in that its good for health in small intakes for MOST people and yes I've seen many studies showing its benefits, neuroprotective which I don't disagree with. I often thought that certain races are basically meant to have an intake of certain foods and even drugs as China/India are heavy consumers as it naturally occurs there yet don't seem to show the rates of illness/allergy we do in the West but then give them alcohol and.......problems arise. Lack of studies and modern medical infrastructure may explain it but i have my doubts, being of celtic origin we have many genetic illnesses only seen in the Northern Europe hemisphere (rosacea, haemochromatosis couple of others) they don't know where and why and how but they do know what worsens them and its almost always dietary.
It could be likened it to the problems certain races have with alcohol once the white man brought them across the oceans (common cold wiping out half the native South Americans once Spanish/Portuguese settlers arrived) and rates of alcoholism are huge mostly due to abnormal rapid/extensive metabolism in races that used other drugs native to the land as their way of recreation or for shamanic purposes (Aborigines, Asian's (seem to lack enzymes/ADH to break down alcohols), Native American's all have abnormal enzymes with high rates of alcoholism).
The form caffeine is consumed in makes a big difference, (in order of lack of reaction) green tea, black tea, dark to almost pure chocolates, milk chocolate not exhibiting any sort of big allergic response (except causing elevations in CK/CPK) even in allergic individuals however coffee, all colas or other caffeinated soft drinks and certainly energy drinks somehow manage to instantly promote anaphylaxis, I'll find the study its spanish 2003. It is an insecticide or poison after all which is why every animal on the planet turns its nose up at it with a few insects having evolved to be able to eat it but studies have shown they appear as ill too if they go overboard or are fooled under laboratory conditions which was noted as far back as 1894 when they originally suspected bipolar disorder was due to some sort of toxic brain syndrome, heavy metals, toxins all suspected then German doctors began to narrow it down to caffeine - true or not i have no idea but why caffeine is not accepted as being able to cause an allergy is simply ridiculous. The antidote to anaphylaxis is adrenaline, caffeine releases adrenaline so it masks its own allergy. Most people(all the docs, internists and shrinks bar a small % also do this and get my point) look at themselves and say "Oh i drink 8 cups of coffee a day and I'm fine" - yes you are fine because you are not allergic.
Anyway the drugs being proposed here are very promising and I'm very confident NMDA, AMPA (again caffeine has a big impact on AMPA) and glycine receptor agonists will work for incurable/TRD depressions. They still are not finding out the root of the issue which may be as simple as a deficiency of naturally occurring NMDA receptor antagonists which are striped of the body by various drugs commonly used today. I had an 18 year stint of TRD depression which i was lucky enough to have gotten through thanks to a mineral supplement which then allowed me with a clear mind to go about finding out the hows and whys behind everything. I suggest if people here do get several weeks to months of freedom from that god awful illness that they do likewise to consolidate themselves from never re-entering its far reaching claws. I'm here to try and help, not to crusade against possible cures. Usually the answers are in the tiniest obscure details or hidden facts. It certainly was in my case but i need to pick and choose my moments more but have very severe ADHD on the hyper level which i'll get medicated much to my annoyance next week, I'm well aware i appear as if i'm on the attack but if anything I'm on the attack against fat cats throwing out a drug that will work for $13,000 a treatment, there is no way in hell a drug can cost that much, no way.