Left: Coffee flower.  Coffee is best grown about 6000 feet, in a moist climate, volcanic soil, under the spreading arms of banana trees.   The coffee flower and bean seen here are direct descendants of coffee beans brought to Guadalupe Island in the 17th century.  Also see medicine.    Caffeine in coffee may raise homocysteine levels and may make a person more susceptible to caner, dementia and Alzheimer's disease.

About caffeine.
Coffee bean grown as under story to bananas on the slopes of a volcano, altitude 6000 feet, tropical rain forest.

WARNING BELOW: To many, coffee may be life saving rather than health threatening.  In the photo below, I am making fresh brew on I 80 somewhere between Cheyenne and Bridger, Wyoming.  KNOWING WHEN TO PULL OVER AND GET A CAFFEINE HIT MAY SAVE YOUR LIFE.  I gave up coffee for a year and was nearly killed a couple of times dozing off.   I believe, a well timed cup of coffee has several times saved my life and perhaps others.  My nephew in law chews tobacco, seems to work for him.  Keep in mind tobacco chewing has been linked to mouth cancer.