Coffee can prevent 5 kinds of "cancer"! Experts recommend the best "coffee drinking guide"

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No matter on the street or in the shopping mall, you can always see such a scene: in a coffee shop, no matter in the morning or noon, there will be a long line at the ordering table.

According to the data, coffee consumption in China is growing at an annual rate of 25%, compared with an average growth rate of 2.5% in the world.

Coffee has always been a controversial drink. Some people love coffee and never leave it every day. Some people think that drinking coffee will harm their health as soon as they mention it.

Experts tell you whether you can drink coffee or not, and summarize the "best consumption" for different groups of people.

Four Health "disputes" of Coffee

As one of the three non-alcoholic beverages in the world, coffee has been popular in Europe and the United States for at least 500 years. This drink, which originated in Africa, was introduced to Europe in the 17th century. Subsequently, coffee quickly spread in Europe and continues to this day.

At present, the United States is the largest market for coffee consumption, with consumption reaching 3 trillion yuan that year, according to 2015 data.

People like to discuss the health effects of any imported food, and coffee is no exception.

As early as the 19th century, the doctor friend of Balzac, a great French writer, said that Balzac's death was related to his habit of drinking a lot of espresso every day. He believes that it was coffee that destroyed Balzac's healthy heart.

However, modern research results show that drinking moderate amount of coffee not only does not harm the heart, but also has a certain protective effect on the cardiovascular system.

In fact, there are more studies related to the health efficacy of coffee, including tumors, diabetes, osteoporosis and Alzheimer's disease, with both advantages and disadvantages.

Protect blood vessels, or hurt the heart?

From the results of many studies at home and abroad, drinking moderate amount of coffee can reduce the risk of coronary heart disease and stroke, which is applicable to people in Europe, America and Asia.

But at the same time, studies have found that people with high blood pressure can lead to an acute increase in blood pressure after consuming coffee. This difference may be related to caffeine intake and personal underlying diseases.

Is there any role in reducing the risk of type 2 diabetes?

Recently, the Harvard School of Public Health and Brighan Women's Hospital jointly released a 12-year study suggesting that long-term coffee consumption can reduce the risk of type 2 diabetes.

Men who drank more than six cups of coffee (one cup of 150ml) a day halved their risk of developing type 2 diabetes and women reduced their risk by 30 per cent. At the same time, caffeine can prevent memory loss and cognitive decline caused by diabetes.

But drinking a lot of coffee in a short period of time may reduce insulin sensitivity and lead to an increase in blood sugar.

Chang Cuiqing said that the current research evidence is that regular daily consumption of the right amount of coffee (2murmur3 cups) is beneficial to reduce the risk of type 2 diabetes.

Can it prevent some cancers?

Exact studies have confirmed that people who drink moderate amounts of coffee a day may have a lower risk of prostate, endometrial, colon, esophageal and liver cancer.

However, the effect of coffee on breast cancer, rectal cancer and bladder cancer can not show a clear correlation.

Will it lead to osteoporosis?

Chang Cuiqing said that the relationship between coffee and osteoporosis is more reflected in intake, while there are gender differences.

Women do have an increased risk of fracture if they drink more than 5 cups of coffee a day.

For men, drinking a moderate amount of coffee may reduce the risk of fracture.

A British survey shows that caffeine leads to calcium loss only if its calcium intake is lower than normal, which will indirectly lead to bone loss.

Use the word "may be effective" to comprehensively evaluate the possible health effects of coffee. Because coffee is a natural extract with complex ingredients, different ingredients have different effects, and it is not surprising that different experiments get different results.

Coffee, for example, contains both antioxidants that help cardiovascular health, as well as diterpenes that increase the risk of cardiovascular disease.

Therefore, the role of coffee should be comprehensively evaluated according to individual conditions, but the general principle is not to drink too much.

The "optimal drinking amount" of different people

The widely accepted recommendation for coffee consumption is that healthy adults drink two or three cups a day, the benefits outweigh the risks, pregnant women can accept no more than two cups a day, and other groups need to be weighed on a case-by-case basis.

Teenagers and children

Caffeine intake is less than 2.5 milligrams per kilogram of body weight per day.

Recently, South Korea's Food and Drug Safety Agency proposed changes to the bill to be introduced next year to ban the sale of caffeinated drinks in primary and secondary schools.

They believe that excessive consumption of caffeine can lead to dizziness, palpitations, sleep disorders, nervousness and other side effects, and teenagers need to strictly control their consumption.

People with heart disease

Five cups a day is the limit.

Everyone has different sensitivity to coffee, generally drinking more than 6 cups of coffee a day, may be addicted, and have insomnia, tension, stomach discomfort, heart rate and breathing and other symptoms. People with heart disease are advised to drink it under the guidance of a doctor.

People with osteoporosis

Preferably no more than 2 Murray 3 cups.

If you already have symptoms of osteoporosis, it is wise to control the amount of coffee you drink every day. It is generally believed that the daily intake of caffeine should not exceed 300 mg, which is about 3 cups of 2 Murray.

A person who is taking medicine.

You'd better not drink.

The interaction between caffeine and drugs may reflect two opposite directions.

For example, ephedrine, which can stimulate nerve excitement, plus coffee, the effect will be greatly enhanced, resulting in "overdose" symptoms. Some drugs may react with caffeine, reducing their efficacy.

There are many drugs that can interact with caffeine. If you are not sure whether it has an effect, you might as well take the simplest approach of not drinking coffee while taking the medicine.

When researchers discuss the interaction between coffee and health, they refer specifically to coffee itself, rather than blended coffee with milk, sugar or coffee companions.

The later addition of milk and sugar will weaken the health value of coffee, especially the "two-in-one" and "three-in-one" instant coffee sold in the market, which has been classified as an "unhealthy drink" due to the addition of a large amount of plant fat powder and sugar.

In addition, whether the coffee is filtered with filter paper or not will also affect the content of harmful diterpenes. It is recommended to drink coffee filtered with filter paper to reduce health risks. Unfiltered coffee may increase the risk of cardiovascular disease.