Coffee is not harmful but excess consumption of coffee is harmful. As per research drinking more than 4 cups of coffee daily is possibly unsafe. Drinking large amounts might cause side effects due to the caffeine content. Children and pregnant women should avoid coffee.Too much caffeine can also cause anxiety in people with panic or anxiety disorders.

Coffee cultivation and trade began on the Arabian Peninsula. By the 15th century, coffee was being grown in the Yemeni district of Arabia and by the 16th century it was known in Persia, Egypt, Syria, and Turkey. European travellers to the Near East brought back stories of an unusual dark black beverage. By the 17th century, coffee had made its way to Europe and was becoming popular across the continent. Coffee began to replace the common breakfast drink beverages of the time — beer and wine. Those who drank coffee instead of alcohol began the day alert and energised. In the mid-1600's, coffee was brought to New Amsterdam, later called New York by the British. Though coffee houses rapidly began to appear, tea continued to be the favoured drink in the New World until 1773. As demand for the beverage continued to spread, there was fierce competition to cultivate coffee outside of Arabia. The Dutch finally got seedlings in the latter half of the 17th century. Their first attempts to plant them in India failed, but they were successful with their efforts in Batavia, on the island of Java in what is now Indonesia. The plants thrived and soon the Dutch had a productive and growing trade in coffee. They then expanded the cultivation of coffee trees to the islands of Sumatra and Celebes.

71% of India's coffee is produced in Karnataka. The largest coffee-producing region of Karnataka is Kodagu (Coorg) district. The other main coffee-producing regions of Karnataka are Chikmagalur, Hassan, Shimoga, and Mysore. Other cities which produce coffee are Kerala, and Tamil Nadu andhra pradesh, odisha, nagaland, aasam.