Knowing your health better.

Caffeine comes from coffee but it is also found in many other products. These include tea, chocolate, cola and some headache drugs.

Caffeine is defined as a drug because it affects the central nervous system. It is categorized as a stimulant because caffeine speeds up production of nerve impulses. Caffeine increases dopamine levels in the brain. Dopamine us a neurotransmitter influencing certain parts of the brain and activating the pleasure centre.

Caffeine blocks adenosine reception so that you feel alert. It then injects adrenaline into the system to give you a boost. It also manipulates dopamine production to make you feel good.

So you can see why your brain might like caffeine in the short term. When taken in liquid form, caffeine produces a number of mild effects on the body.

A small dose such as one cup of coffee can have the following effects:

· Increased body temperature & metabolism.

· Increased urination.

· Increased alertness.

· Stimulated secretion of gastric acids.

· Stimulated secretion of serotonin.

· Dehydration.