Will drinking a cup of coffee a day cause cancer? 3 truths about coffee

As one of the three major non-alcoholic beverages in the world (the other two are cocoa and tea), coffee is deeply loved by people.

Because of the rich aroma of coffee;

Because of the mellow taste of coffee;

Because coffee can refresh your mind ...

Many people have become loyal fans of coffee. No matter what they do or where they are, they always have a cup of coffee in their hands.

However, there are a lot of myths about coffee! We’re going to talk about 3 of the biggest ones.

(Photo source: Panorama Network)

1. Coffee causes cancer

Does coffee really cause cancer?

Truth: No.

Authoritative evidence:

①In 2008, a study conducted by Beijing Obstetrics and Gynecology Hospital of Capital Medical University gave the answer: there is no correlation between drinking coffee and the incidence of breast cancer .

②In 2015, an article in the authoritative magazine "Breast Cancer" stated: Regardless of whether coffee drinks contain caffeine, there is no direct relationship with the incidence of breast cancer.

If there is any connection, it is that you should not drink coffee that is too hot immediately, as it will burn your mouth! Drinking too much hot coffee can easily lead to throat cancer.

(Photo source: Panorama Network)

2. Coffee harms cardiovascular health

Does coffee really cause cardiovascular disease?

Truth: No.

The main active ingredient in coffee is caffeine .

Caffeine can be quickly absorbed by the intestines and enter the blood, then reach various parts of the body and release substances that excite the nerves.

Some scholars have studied the topic of coffee and cardiovascular health. Coffee can speed up the heart rate, enhance myocardial contraction, and increase blood pressure. They are worried that drinking coffee for a long time will cause physical discomfort .

But later researchers found that the above research was not rigorous; they re-did the relevant research and after excluding the influence of age, gender and lifestyle factors, they found that normal coffee drinking not only does not increase the incidence of cardiovascular disease, but will reduce the risk of cardiovascular disease.

(Photo source: Panorama Network)

3. Coffee hurts your stomach

Does coffee really cause gastrointestinal problems?

The truth: Don’t worry too much.

People believe that drinking coffee on an empty stomach is bad for the stomach because coffee increases the secretion of gastric acid, causes relaxation of the esophageal sphincter, aggravates acid reflux, and increases the risk of gastric ulcers.

But to be honest, the occurrence of gastric ulcers has little to do with coffee. The real "culprit" is Helicobacter pylori and bad eating habits.

So don’t worry too much that drinking coffee will hurt your stomach.

However, for people who already have gastric ulcers or intestinal inflammation, coffee is a slightly stimulating beverage. It is better to avoid drinking it during the recovery period to facilitate recovery.

In general, coffee is still safe to drink and there are no so-called harmful effects.

Just be careful about one thing: caffeine intake .

Adolescents → caffeine intake less than 2.5 mg /kg body weight per day;

Adults → caffeine intake should not exceed 400 mg per day;

Heart disease patients → do not drink more than 5 cups of coffee a day;

Osteoporosis patients → no more than 2 to 3 cups per day.

People who are taking medicine → it is best not to drink ;