You mean research like this?
"17. Caffeine causes stress on the body. Stress is a factor in most diseases."
"18. Caffeine lowers your stress threshold. In other words, coffee drinkers handle stress less effectively."
"27. Caffeine causes depression and anxiety, and can lead to panic attacks."
"26. Coffee plays a role in malnutrition. Caffeine causes an increased loss of thiamin and other B vitamins, calcium, minerals, sodium, chloride, potassium, magnesium, and zinc. “"
"29. Coffee makes you crazy!"
Yeah, awesome, this is all over the internet too. Or the one government test that linked caffeine to issues with women during pregnancy?
Caffeine inhibits brain phospholipase, making it neuroprotective on a wide scale.
Regulatory functions of phospholipase A2. [Crit Rev Immunol. 1997] - PubMed - NCBI
Not to mention it inhibits iron, lowers serotonin, and per calorie has a great range of nutrients.
B-b-but caffeine gives you a boost therefore it must be bad that's not natural...