How much is caffeine in tea and coffee?
We all know that coffee has a stimulating effect on the body - but its dosage plays a decisive role in how much this effect will manifest itself. Unfortunately, the content of caffeine in coffee, tea and other drinks is almost never indicated on the package.
Scientific studies suggest that a dose of caffeine in 50-80 mg improves mood and increases productivity, 250-300 mg lead to a heartbeat, 400-500 mg can cause depression, and 10,000 mg - death. But how do you know how much caffeine is in your cup?
Table of caffeine content in drinks
The content of caffeine in tea or coffee depends both on the type of feedstock and on the duration of the brewing. The role is played and the size of the portion - an espresso cup( 30 ml) usually contains 40-75 mg of caffeine, whereas a large drink from Starbucks( 700 ml) can contain as much as 300 mg of this substance.
Despite the fact that tea is considered to contain less caffeine than coffee, this is not always the case. A small cup of instant coffee can have less caffeine in its composition than a large cup of hard-boiled tea. In addition, caffeine is found in many carbonated drinks.
|Drink||Approximate caffeine content|
|Cup of boiled coffee( 250 ml)||95 - 200 mg|
|Instant coffee cup( 250 ml)||30 - 200 mg|
|Cup of decaffeinated coffee( 250 ml)||2 - 30 mg|
|Espresso coffee30 ml)||40 - 75 mg|
|Black tea cup( 250 ml)||15 - 70 mg|
|Green tea cup( 250 ml)||25 - 45 mg|
|Energy drink( 250 ml)||70 - 100 mg|
|Dark chocolate bar(100 g)||30 - 50 mg|
|Ice cream with chocolate taste||30 - 45 mg|
|Carbonated beverages of Cola-Cola type( 330 ml)||25 -40 mg|
|Bottled ice tea( 330 ml)||5 - 40 mg|
|Cup of hot chocolate( 240 ml)||5 - 10 mg|
What coffee is more caffeine?
Another popular myth is that there is less caffeine in soluble coffee than in natural coffee. However, there is no unambiguous answer here, since instant coffee most often contains synthetic caffeine. As a result, only the manufacturer decides how much of this substance will be contained in the product.
In this case, the sort of coffee beans used to make instant coffee does not really matter - although usually arabica contains about half the caffeine content than robusta, only taste qualities remain in granulated coffee from these varieties, but not caffeine itself.
All kinds of coffee and tea contain caffeine. Even decaffeinated varieties will have a certain amount of stimulant in the composition - especially if it is ground coffee. People who are acutely responsive to caffeine and avoid it, it is best in principle to limit the consumption of coffee and tea.
The lowest level of caffeine is found in granulated decaf coffee and packaged decaffeinated tea - in this case the manufacturer can really get rid of the "unnecessary" substance by chemical processes. However, the procedure for removing caffeine is not always safe.
The technology of caffeine removal from tea and coffee is quite complex - often using aggressive chemicals for this. For a long time dichloromethane, known for its carcinogenic properties and forbidden in household chemicals, was used for these processes.
That's why it is recommended to buy not just the cheapest caffeine tea, but only those brands that have the mark "bio-product" and the badge of certification in the EU.In this case, it can be ensured that only methods that are harmless to human health have been used to extract caffeine.
Does the coffee harm the health?
It is believed that when consumed in adequate doses, caffeine is completely safe for health. In some cases, it is even used in medicines to enhance their effects - caffeine is part of some pain relievers and remedies for headache relief.
However, the key to using caffeine is its dosage. Scientific studies indicate that a single intake of 450-500 mg of caffeine provokes a feeling of anxiety or even a panic attack. Regular use of such doses unambiguously harms the psyche and provokes depression.
Caffeine: the maximum dose of
Dietitians tend to think that the safe dose is the total intake of 200-300 mg of caffeine per day. Dependence on caffeine is formed at doses of 300-500 mg per day - in this case, rejection of coffee will provoke withdrawal symptoms( irritability and headache).
In most cases, these symptoms will disappear for 3-4 days, and the complete removal of caffeine from the body will take about a week. In this case, the half-life of caffeine( the time required to reduce the level of caffeine in the body in half) is usually from 3 to 5 hours.
Despite the fact that regular use of high doses of caffeine provokes depression and manic thoughts, the real content of caffeine in tea and coffee is never indicated on the package. That is why it is important at least approximately to understand how much coffee you drink per day.