Caffeine is like alot of so called natural drugs, too much or too little of something is bad. They say two cups of coffee is good for you, too much causes osteoporosis. However in a coke, it can cause tremendous amounts of cancer. Anything scientifically blended can do this, if it is not found in nature, do some research, I could prob write like 10 pages about this, it's best to find the information yourself. Caffeine is a drug though because it is addictive, that is the bottom line. Some is actually known to increase your life span and your daily habits as far as alertness and productivity can increase, this is good for many reasons. Lisa do you have any comments on this?