Caffeine

Coffee plant (Coffea arabica), with fruits. The fruits which are used to make coffee, contain caffeine.

Caffeine is a natural stimulant found in many different foods and beverages, such as coffee, tea, chocolate, and energy drinks. The substance is widely consumed around the world and is known for its ability to increase alertness, energy, and focus.

Effects on the Body

Caffeine works by blocking the action of adenosine, a neurotransmitter that promotes sleep and relaxation. By blocking the action of adenosine, caffeine can increase the activity of other neurotransmitters, such as dopamine and norepinephrine, leading to increased feelings of alertness and energy.

In addition to its effects on the brain, caffeine can also have a variety of effects on the body. The substance has been shown to increase heart rate, blood pressure, and respiratory rate and can also cause diuresis, or increased urination.

Sources of Caffeine

Caffeine is found in many different foods and beverages, with the most common sources being coffee, tea, chocolate, and energy drinks. The amount of caffeine in these sources can vary widely, depending on factors such as the type of beverage, the method of preparation, and the serving size.

In addition to these natural sources, caffeine is also commonly added to a variety of different products, such as medications, weight loss supplements, and sports drinks.

Health Effects

Caffeine is generally considered safe for most people when consumed in moderation and has even been shown to have some potential health benefits, such as improving cognitive function and reducing the risk of certain diseases.

However, excessive caffeine consumption can lead to a variety of different health problems, such as insomnia, anxiety, and cardiovascular issues. In addition, caffeine can be addictive, and withdrawal symptoms can occur when consumption is abruptly stopped.

Where caffeine is from

• Caffeine is the main drug in coffee, which comes from a tree. The seeds of the tree are roasted to make coffee.
• Caffeine comes from other plants as well. It is in guarana, yerba maté, cacao, and some plants used to make tea. The plants use caffeine as a pesticide, which is a chemical that kills insects if they eat the plant. It is the way the plant protects itself.
• Caffeine was first extracted from cocoa beans into its purest form, which is a white powder. The word originated from the German word “kaffee” and the French word “café,” which both mean caffeine.
• It is called guaranine when it comes from the guarana plant and theine when it comes from a tea plant. It is called mateine in the mate drink, an infusion made with Yerba mate.

What caffeine is

Caffeine is a stimulant drug. A stimulant is a drug that increases body actions like heart rate, blood pressure, and metabolism, making a person more awake and alert.

Caffeine is also a diuretic, meaning it makes a person produce more urine.

The caffeine chemical is called a xanthine alkaloid, which is a group of chemicals that are stimulants. Some xanthine alkaloids (like theophylline) are used to help asthma.

What caffeine is used for

• The biggest use of caffeine is as a stimulant. People drink coffee and other drinks with caffeine to stay awake.
• Doctors sometimes use caffeine as a medicine. It is used for headaches (head pain). It is sometimes used to help premature babies breathe. The short-term risk of this treatment seems to be that the babies treated gain less weight than usual.
• Caffeine is sometimes given to people after a lumbar puncture. This is a test to see if someone has meningitis.

See also

• Coffee
• Tea
• Chocolate
• Energy drink
• Addiction

External links

• Caffeine from the National Center for Biotechnology Information
• Questions and Answers on Caffeine from the U.S. Food and Drug Administration

Caffeine Resources
Latest articles Most recent articles Ongoing trials	Wikipedia