Caffeine is a natural alkaloid found in some plants. These plants use it to scare away different vermin.

A human being is one of those creatures who can consume it without serious consequences for health.

In its pure form this substance is a white odorless crystal powder of slightly bitter taste.

Commercially caffeine is produced by extracting from cocoa beans and tea waste. Besides, today there are certain technologies that make it possible to manufacture synthetic caffeine.

Chocolate is one of the products that contain caffeine. A chocolate bar may contain about 30 mg of this substance. This is one of the reasons why chocolate is able to boost spirits.

More Info: en.wikipedia.org