Coffee and Health: caffeine content

Many people who have doubts about coffee are mainly worried about health problems, and the biggest uncertainty is caffeine.

The most common worry is that caffeine interferes with sleep.

In fact, many of the diets we come into contact with in our daily life contain caffeine, such as tea and cola, but these diets have become commonplace in our daily life and are more acceptable than coffee.

Coffee drink

At present, instant coffee and freshly ground coffee made with coffee beans are common.

The US Food and Drug Administration has measured the caffeine content of common coffee drinks, and the conclusions are as follows (the default is about 150ml per drink):

Category

Floating interval (mg/5oz)

Average (mg/5oz)

Roast freshly ground coffee (hand extraction)

60-180

one hundred and fifteen

Instant Coffee

30-120

sixty-five

Although the caffeine content of instant coffee is lower than that of hand-brewed coffee, it consumes more.

Caffeine content varies greatly depending on the producer. In general, most instant coffee is about 71mg, and the way of dripping is basically below 85mg.

In addition, the variety of coffee can also bring huge differences in caffeine content. Robusta coffee has a caffeine content of Arabica coffee (Coffea. Twice as much as Arabica.

Other drinks

Tea is the most caffeinated drink in daily contact, and it is almost our national drink. TC is generally regarded as a country with traditional tea culture.

In terms of the same weight, tea contains more caffeine than coffee, but brewing the same amount of drinks uses less tea leaves than coffee. According to a Canadian study, according to the type and brewing time of tea, the caffeine content is as follows:

(average, mcg/ml)

Category

2 minutes

5 minutes

Tea bag

two hundred and thirty eight

four hundred and two

Loose tea

one hundred and eighty nine

two hundred and ninety five

In household brewing samples, the caffeine content is low, about 159mcg/ml, but varies widely. Usually a cup of tea contains less caffeine than 60mg, but strong tea may have more caffeine than light coffee.

Let's take a look at another type of daily food, cocoa and chocolate drinks. About 4-5mg per cup, plain chocolate and baking chocolate contain about 10-26mg caffeine per ounce, or about 0.7-0.9mg caffeine per gram.

In addition, most soft drinks, such as cola, also contain caffeine. For Coke, cola nuts used to increase aroma contain caffeine, which may contain 30-60mg caffeine per 12oz cola. Mainstream cola brands contain about 120mg caffeine per liter.

Drugs

Many drugs also contain caffeine, commonly used in the treatment of headaches, pain relief, improve digestion, cold and other drugs. Depending on the type of drug, the amount of caffeine in each pill ranges from 7mg to 200mg.

We really can't live without caffeine in our daily life. Even if we don't drink coffee, caffeine has long been a part of our daily life. Scientists believe that moderate consumption of caffeine will not affect health. In general, it is recommended to limit your daily caffeine intake to within 300mg, about 3-4 cups of hand-brewed coffee.