Everyone knows that caffeine gives your brain a boost and helps you be more alert and less tired, however that’s if you drink it in moderation.
If you were to drink 2 liters of Coca cola or a similar beverage per day, for months, would you experience the opposite, your brain having an “anti-boost” and working less efficiently? I drink too much of soda and caffeine and I often feel tired, both physically and mentally, even though I sleep well and eat normally, I go for walks with my dog, so caffeine, or perhaps the added sugars or a combination of them is most likely the reason.
Caffeine does affect anxiety, since it tampers with adrenalin and some other stuff, it can lead to depression, mood swings and the sugar affects energy swings, where you feel boosted for a while, but drained afterwards, however I couldn’t find anything that specifically talks about the ability of brain to process things, even though I’m 100% sure there is at least some effect, from either the caffeine or sugar.
Also, I had agoraphobia, which is a fear of public spaces, or more precisely in my case the fear that something will happen to me when in that situation, since I blacked out 2 times in front of a lot of people, so that got in my mind and I felt scared going to public spaces for a long time after that, I realized that whenever I have a smaller dosage of soda, that I don’t feel as scared and eventually I stopped having agoraphobia, at the start I had trouble even going to my local shop, but afterwards I could walk through the center of the city and visit a bunch of shops and not feel a thing, so fueling phobias is an additional negative effect of caffeine.