Coffee, famous for its high caffeine content. Caffeine is a compound result of secondary metabolism of the plant alkaloids of coffee and has a unique taste bitter. Various health effects of coffee in general has always been associated with the activity of caffeine in the body. The main role of caffeine in the body is, to improve psychomotor work so that the body is maintained and physiological effects of increased energy. The effect this will usually only seen a few hours later after coffee consumption. Apparently, caffeine not only found in coffee plants, but are also found in tea leaves and cocoa. Caffeine content of a cup of coffee about 85 mg. While the safe limit caffeine consumption into the body is 100-150 mg per day. With this amount, the body has experienced a considerable increase in activities to make stay awake.
The content of caffeine in coffee, have a diverse effect on every human being. Some people will have direct effects, while others do not feel it at all. This is related to the genetic nature of each individual associated with the body's ability to digest caffeine metabolism. Caffeine metabolism occurs with the help of the enzyme cytochrome P450 1A2 (CYP1A2). There are 2 types of enzymes, namely CYP1A2-1 and CYP1A2-2. People who have CYP1A2-1 enzyme, capable mematabolisme caffeine quickly and efficiently so that the effects of caffeine can be felt significantly. Enzymes CYP1A2-2, has a slow rate of caffeine metabolism so that most people with this type do not feel the health effects of caffeine and even tend to cause negative effects.
Caffeine content
Taken from wikipedia: Depending on the type of coffee and method of preparation, the caffeine content of a single serving can vary greatly. The caffeine content of a cup of coffee varies depending mainly on the brewing method, and also on the variety of seed. According to the USDA National Nutrient Database, an 8-ounce (237 ml) cup of "coffee brewed from grounds" contains 95 mg caffeine, whereas an espresso (25 ml) contains 53 mg.
According to an article in the Journal of the American Dietetic Association, coffee has the following caffeine content, depending on how it is prepared:
| Serving size | Caffeine content | |
|---|---|---|
| Brewed | 7 oz, 207 ml | 80–135 mg |
| Drip | 7 oz, 207 ml | 115–175 mg |
| Espresso | 1.5–2 oz, 45–60 ml | 100 mg |
Caffeine content in each beverages
| Source | Caffeine content |
|---|---|
| A cup of coffee | 85 mg |
| A cup of tea | 35 mg |
| Carbonated beverages | 35 mg |
| Energy drinks | 50 mg |
| Coffee Types | Level |
| Instant coffee | 2,8 - 5,0% |
| Mocha coffee | 1,00% |
| Robusta coffee | 1,48% |
| Arabica coffee | 1.10 % |
The coffee is widely consumed by athletes before the game. Many developing issues concerning the negative effects of drinking coffee for the body, such as increased risk of cancer, type 2 diabetes mellitus, insomnia, heart disease, and loss of concentration. Several studies reveal precisely the opposite. The content of caffeine found in coffee was able to suppress the growth of cancer cells gradually. In addition, caffeine can reduce the risk of type 2 diabetes by maintaining the body's sensitivity to insulin. The caffeine in coffee has also been shown to prevent heart attacks.
Caffeine is not one addictive substance. Actually it is one element that is quite safe. It works as a stimulant that stimulate the nerve cells in the brain. Where some other stimulants such as nicotine can be considered as one of the addictive substance, you will not have addiction to caffeine if consumed in moderate levels. But, if you are accustomed to consuming caffeine you could just feel the "dependency". It is marked as not consume coffee or other beverages containing caffeine, you feel a headache, fatigue and difficulty concentrating, nausea, and even up muscle aches.
