The caffeine in your coffee goes into the bloodstream and travels to the liver, where it is broken down into various compounds.
It affects the brain by blocking the neurotransmitter adenosine, which otherwise makes us tired or sleepy. It also promotes the neurotransmitters dopamine and norepinephrine, resulting in an alert, focussed brain after about an hour of intake.
Apart from natural sources like seeds, nuts or beans, caffeine is found in espresso, tea, energy drinks, chocolate (and chocolate milk), among other foods.
It is also a part of over-the-counter drugs for cold and pain and in weight loss supplements.
Coffee intake lowers the risk of heart disease and stroke. It tends to increase blood pressure to a small degree in some people.
People who drink coffee in large quantities have a lower risk of type-2 diabetes.
Other benefits of coffee consumption are:
Coffee is addictive and excessive intake can lead to restlessness, anxiety, irregular sleep and heart issues. It can cause headaches, high blood pressure and migraine in some people. It is also advisable to avoid coffee with certain medications.
The recommended maximum dosage of caffeine(not coffee) is 200 to 400 mg per day. It is to be noted that drinking above 500 mg of caffeine in a day can be fatal. As one teaspoon of coffee contains approximately 50 to 60 mg of caffeine, the per day maximum intake should be 7 to 8 teaspoons of coffee powder.
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