Caffeine

Posted by admin | On: Jan 19 2017

What is Caffeine?

Caffeine is a natural stimulant most commonly found in tea, coffee and cacao plants.CAFFEINE

It works by stimulating the brain and central nervous system, helping you to stay alert and preventing the onset of tiredness.

Historians track the first brewed tea to as far back as 2737 BC

Coffee was reportedly discovered many years later by an Ethiopian shepherd who noticed the extra energy it gave his goats.

Caffeinated soft drinks hit the market in the late 1800s and energy drinks soon followed.

Nowadays, 80% of the world’s population consumes a caffeinated product each day, and this number goes up to 90% for adults in North America

Bottom Line: Caffeine is a natural stimulant consumed worldwide. Most people get it from coffee, tea, soft drinks, energy drinks or chocolate.

How does it Work?

Once consumed, caffeine is quickly absorbed from the gut into the bloodstream.

From there, it travels to the liver and is broken down into compounds that can affect the function of various organs.

That being said, caffeine’s main effect is on the brain.

It functions by blocking the effects of adenosine, which is a neurotransmitter that relaxes the brain and makes you feel tired

caffiene

Normally, adenosine levels build up over the day, making you increasingly more tired and causing you to want to go to sleep.

Caffeine helps you stay awake by connecting to adenosine receptors in the brain without activating them. This blocks the effects of adenosine, leading to reduced tiredness

It may also increase blood adrenaline levels and increase brain activity of the neurotransmitters dopamine and norepinephrine

This combination further stimulates the brain and promotes a state of arousal, alertness and focus. Because it affects your brain, caffeine is often referred to as a psychoactive drug.

Additionally, caffeine tends to exert its effects quickly.

For instance, the amount found in one cup of coffee can take as little as 20 minutes to reach the bloodstream and about one hour to reach full effectiveness

Bottom Line: Caffeine’s main effect is on the brain. It stimulates the brain by blocking the effects of the neurotransmitter adenosine.

Which Foods and Beverages Contain Caffeine?

Caffeine is naturally found in the seeds, nuts or leaves of certain plants.

These natural sources are then harvested and processed to produce caffeinated foods and beverages.

Here are the amounts of caffeine expected per 8 oz (240 ml) of some popular beverages

  • Espresso: 240–720 mg.
  • Coffee: 102–200 mg.
  • Yerba mate: 65–130 mg.
  • Energy drinks: 50–160 mg.
  • Brewed tea: 40–120 mg.
  • Soft drinks: 20–40 mg.
  • Decaffeinated coffee: 3–12 mg.
  • Cocoa beverage: 2–7 mg.
  • Chocolate milk: 2–7 mg.

Some foods also contain caffeine. For instance, 1 oz (28 grams) of milk chocolate contains 1–15 mg, whereas 1 oz of dark chocolate has 5–35 mg

You can also find caffeine in some prescription or over-the-counter drugs like cold, allergy and pain medications. It is also a common ingredient in fat loss supplements.

 

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