What compounds do coffee and healthy coffee contain, and how much coffee is appropriate to drink every day?

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Coffee is a simple drink, but it is rich in healthy compounds. Although caffeine is the most studied compound in coffee, coffee actually contains hundreds of bioactive substances, including vitamins, minerals and antioxidant polyphenols such as flavonoids. There is growing evidence that coffee drinking is associated with reducing the risk of many diseases-not by one of the ingredients, but by a combination of compounds. At present, there is a lot of evidence to support coffee drinking. That's why coffee was associated with a lower risk of heart disease and type 2 diabetes in the 2015 American Dietary guidelines Committee report, which found that a healthy diet could drink five cups of coffee a day (about 400ml caffeine).

About coffee consumption: usually a large cup of coffee is 8 ounces (about 240ml), so a large cup of coffee on your table may exceed the recommended amount. Therefore, when drinking coffee, be sure to take into account the size of the coffee cup and keep the daily amount of coffee not exceeding the daily recommended total. Also, the coffee mentioned in the dietary guidelines report, which refers to black coffee, has not been added.

Coffee contains a compound called acrylamide, which occurs naturally in some foods cooked at high temperatures, including roasted coffee beans. Acrylamide is also found in other baked or fried foods, including French fries, potato chips and grains in cereals, whole wheat bread and baked goods. So, what do you need to worry about? It was first discovered that acrylamide may cause cancer in an animal experiment in which animals were fed with high doses of acrylamide, much more than they might normally ingest from normal food or drink. Therefore, consumers need to understand the following points:

First, acrylamide has existed in our food for hundreds of years; second, there is no randomized trial that shows that acrylamide in daily food is directly harmful to humans; and third, there is very little acrylamide in food. much lower than the daily exposure that could cause harm to the human body.

It is worth noting that there are few randomized controlled trials studying the effects of coffee on long-term human health, and most studies are observational studies that can only prove the correlation-not the result of coffee directly causing (or preventing) it. However, previous studies have found that drinking a few cups of coffee is not harmful and may actually be good for your overall health.