Caffeine is a substance bitter in taste, which is grown naturally in plants such as tea leaves, coffee beans, cacao pods, and kola nuts. Synthetic caffeine is also available in the market nowadays, which is usually added to make some medicines, drinks, and foods. Painkillers and energy drinks also contain some amount of caffeine in them. Caffeine pills are also available in the market. They have an average amount of 100 to 200 mg caffeine per serving.
How long does the effect of caffeine last?
Once you drink or eat caffeine, within an hour it mixes completely with your blood and the effects of caffeine last in your body for four to six hours.
The quantity of caffeine in various drinks
- Caffeine in Coffee: A 230 ml cup of coffee has 95-200 mg caffeine in it.
- Caffeine in Tea: A 230 ml cup of tea has 14-60 mg caffeine content.
- Caffeine in Coca-Cola: A 350 ml jar of cola has 35-45 mg of caffeine.
- Caffeine in Energy Drinks: A 230 ml can of energy drink has 70-100 mg caffeine in it.
Effects of Caffeine on Human Body
Intake of caffeine has many effects on the metabolism of your body. Let’s discuss a few of them:
- Caffeine gives you instant energy and makes you feel awake by stimulating your nervous system.
- Effect of caffeine on heart rate is that it caused rapid heart movements.
- It makes you urinate more often making your body get rid of the extra amount of salt and water retained in the body.
- Effect of caffeine on plant growth is that the plants grow at a faster rate.
- You can go through an upset stomach and heartburn because of the release of more acid in your stomach.
- A high rate of blood flow is the most common effect of caffeine on blood pressure.
- It can make absorption of calcium difficult for your body.
- Caffeine intake increases your blood pressure.
Side effects of too much caffeine intake
You can safely consume up to 400 mg of caffeine in a day. However, if your intake goes higher than this, there can be negative effects of caffeine on your body such as
- A Headache, Dizziness, and Insomnia
- Shakiness and Restlessness
- Abnormal heart rhythm
What are physiological effects of caffeine?
Caffeine stimulates your central nervous system. As it reaches your brain, it alerts the brain thereby making you stay awake. You become more alert and active. Caffeine is thus also used in making some medicines to manage the drowsiness and headaches.
What is Caffeine Withdrawal?
If you consume caffeine on a regular and you have suddenly refrained yourself from doing so, it is termed as caffeine withdrawal.
Common side effects of Caffeine Withdrawal
- Depressed Mind
- Decrease in alertness
- Fatigue and sleepiness
- Muscle pain and stiffness
- Difficulty in thinking and concentrating
- Sinus problems
How Caffeine affects various aspects of the human body?
Effect of caffeine on the body:
Caffeine keeps the brain awake and keeps it alert. It relieves drowsiness. It decreases the risk of suicide. It reduces headaches and hangover, however, too much caffeine can lead to confusion as well. There is also a possibility that caffeine decreases the risk of oral cancer. Caffeine prevents the absorption of calcium in bones.
Effect of caffeine on metabolism:
A cup of tea raises metabolism by 12%, according to a study. As Caffeine is a central nervous system stimulant, thus it reverses metabolism by 5-8%.
Effect of caffeine on sleep:
Caffeine intake can render sleep. According to a study, consuming caffeine 6 hours before bedtime reduced total sleep time by 1 hour. Thus always remember not to take caffeine before you are going to sleep.
Effect of caffeine on blood vessels:
Caffeine has an adverse effect on blood vessels. It contracts vessel walls which ultimately leads to narrowing of the blood vessels. It increases blood pressure and decreases circulation inside the body.
Effect of caffeine on the brain:
When we have caffeine, it binds to our brain’s adenosine receptors and thus prevents the chemical from binding to the receptors of the brain. This keeps us energetic and does not let us tired.
Who should avoid or limit the use of Caffeine?
- A Pregnant woman should avoid caffeine as it passes to your baby via the placenta.
- Breastfeeding mums should not take caffeine as it can get passed to your baby through breast milk.
- People having insomnia or sleep disorders.
- People having chronic headaches and migraines.
- People who are taking some medicines, supplements, antibiotics, heart medicines or asthma medicines should not take caffeine as it can interfere with your medicines.
- Children or teenagers should also avoid the use of caffeine as they are sensitive to caffeine.
- If a person has irregular heart rhythm, he should avoid caffeine.
- People suffering from high blood pressure should stay away from caffeine.
- If you have ulcers or GERD, stay away from caffeine.
What are Caffeine pills?
Caffeine pills are the supplements which are made from caffeine. These pills might take natural caffeine and some may take artificial caffeine. Caffeine pills are almost same as caffeine powder. These pills also provide the same benefits as caffeine. It can also be proved harmful to some and for some, it can be beneficial. Few people have to limit their caffeine pills intake, as it may cause heart disease. Some caffeine pills are time released as well.