What Is Caffeine? What Are The Effects Of Caffeine On Our Body?

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Most of us rely on a cup of coffee or some caffeine in the afternoon to help us get through the day. Caffeine is so common that the U.S. Food and Drug Administration (FDA) states that around 80 percent of American adults take some form of caffeine every day. But caffeine does more than just keep you awake. It is a central nervous system stimulant that affects your body in various ways.

Learning about the long-term effects and symptoms of caffeine makes you think twice about maybe getting your fourth cup of coffee. Read on to find out what these effects are. Caffeine itself has no nutritional value. It has no taste, so you never know if your food contains caffeine. Some medicines may even contain some caffeine without your knowledge.

This component almost always causes some symptoms. It can make you feel a little energy when consumed at the lowest level, but when consumed too much can cause symptoms of addiction. The Mayo Clinic says consuming as much as 400 milligrams of caffeine per day is safe for most healthy adults.

Remember that a standard cup of coffee is 8 ounces or roughly 227 milligrams. If you use mugs or drink coffee from the coffee house you always go to, this amount can be 16 ounces or more. For this reason, it would be best for you to know the effects of caffeine.

Your body’s tolerance to caffeine

If you consume the same amount of caffeine every day, your body’s tolerance to caffeine will increase. Your body mass and general health are factors that determine your tolerance to caffeine. If you want to reduce your consumption to an ideal level, gradually reducing your daily caffeine intake is your best option.

Central Nervous System

Caffeine acts as a stimulant in your nervous system. When it reaches your brain, its most noticeable effect is alertness. You will feel more awake and less tired, so it is used as a common ingredient in medicines to treat or manage headaches, migraine, and drowsiness.

Also, studies suggest that people who regularly consume coffee have a lower risk of Alzheimer’s and dementia, and caffeine reduces the risk of suicide by forty-five percent. However, these benefits show not only in those who consume decaffeinated coffees but in people who consume coffees with high amounts of caffeine. Some people see coffee as a healthy drink, but like other foods, excessive consumption of coffee can cause some negative side effects.

For example, too much caffeine consumption can cause headaches. The reason for this is related to caffeine withdrawal. The blood vessels in your brain get used to its effects and can cause headaches if you suddenly stop caffeine intake.

Other symptoms of caffeine withdrawal include:


In some people, suddenly stopping caffeine intake can cause tremors.

Although extremely rare, overdosing can also cause:

Clouding of consciousness

Overdose of caffeine consumption can result in death from convulsions. An overdose occurs by consuming large amounts of caffeine, most energy drinks, or diet pills. The Mayo Clinic says consuming as much as 400 milligrams per day is safe for most healthy adults. Although the amount of caffeine in beverages varies greatly, this amount corresponds to 4 cups of coffee.

Effect of Caffeine on Digestive and Excretory Systems

It increases the amount of acid in your stomach and can cause heartburn or heartburn. If you have stomach problems such as reflux or ulcers, it would be best to consult your doctor before consuming it.

The caffeine you consume as extra is not stored in your body. It is processed in the liver and excreted through urine. For this reason, your rate of going to the toilet may increase shortly after consuming it.

Effects of Caffeine on Circulation and Respiratory Systems

Caffeine is absorbed in your stomach. It reaches its highest level in your bloodstream an hour or two after consuming it. It can increase your blood pressure for a short time. This effect is thought to be caused by increasing adrenaline in your body or by its nature blocking the hormones that allow your arteries to expand.

It does not have a long-term effect on blood pressure in many people, but if you have a heart rhythm disorder, it can cause your heart to beat faster. Overdose can cause fast or irregular heartbeat and breathing problems. In rare cases, overdose can result in death from convulsions or irregular heartbeat. If you have hypertension or a problem with the heart, we recommend that you consult your doctor whether its consumption will be a problem.

Effects of Caffeine on Skeleton and Muscular Systems

Its high consumption may interfere with calcium metabolism and calcium absorption. This can lead to osteoporosis. Again, too much consumption can cause your muscles to twitch. Muscle aches can also be seen as a symptom of withdrawal.

The Effect of Caffeine on the Reproductive System

Caffeine travels in the blood circulation system and crosses the placenta. Because it is a stimulant, it can affect your baby’s metabolism and increase heart rate. Too much consumption may cause the growth rate of the fetus to slow down and increase the risk of miscarriage. However, in most cases, a small amount of intake is beneficial during pregnancy.

According to the Mayo Clinic, someone who wants to get pregnant should fix their daily intake at 200 to 300 milligrams. Because there are some studies that the consumption of large amounts can interfere with the metabolism and estrogen production of the person who wants to become pregnant.