Drinking coffee has become a habit for some people. In the morning without a cup of coffee, the person is sluggish, limbs confused, difficult to focus on work. Why is that?
The main reason is in coffee with caffeine – stimulants central nervous system and diuretic. And not only does coffee contain this substance, but many other plants such as tea leaves, cocoa beans, chocolate also contain caffeine.
When ingested, caffeine will be absorbed and dispersed quickly. After absorption, caffeine enters the brain, making us refreshed, happy, excited, and thinking fast.
Caffeine does not accumulate in the blood nor store in the body, but is excreted in the urine several hours after ingestion. It also does not reduce the effects of alcohol, although many people believe that drinking a cup of coffee will make people drunk.
Caffeine is also used to treat migraine headaches and to reduce anxiety or drowsiness in the short term.
In addition, it is often combined with over-the-counter medications like pain relievers and cold medicines. It is tasteless and can be separated from food by a chemical process called decaffeination.
What if drinking too much coffee a day? The disadvantage of caffeine is the decrease in absorption of some minerals such as iron, calcium, zinc, magnesium, potassium and loss of B vitamins, vitamin C.
Drinking a lot of coffee will make the adrenal gland secrete adrenalin and the pancreas secrete glucagon. These two hormones convert glycogen stored in the liver into glucose, causing blood sugar to rise.
There is a theory that caffeine enhances the effect of insulin so it helps transfer glucose to cells, which helps to prevent type 2 diabetes. Very beneficial for the elderly.
Caffeine also increases cholesterol storage, which increases the risk of atherosclerosis, drinking more will double the risk of myocardial infarction than non-drinkers.
Pregnant women should not drink too much coffee because high concentrations may cause miscarriage or premature birth, because caffeine is absorbed through the placenta.
For menopause, women should also limit the use of coffee because it tends to increase the risk of osteoporosis. Drinking too much coffee will make your heart beat faster, urinate more, nausea, vomiting, irritability, anxiety, restlessness, trembling and trouble sleeping.
Quitting coffee suddenly can cause headaches, dizziness, irritation, nausea, vomiting and other symptoms. If you remove it slowly, you will reduce these symptoms.
In addition to the main active ingredient, caffeine as mentioned above, there are many other substances in coffee, including beneficial substances such as antioxidants. But there are also substances harmful to health such as chlorogenic, neo chlorogenic, mercaptan.