The so-called draft beer is essentially the same as ordinary cooked beer (if ordinary people only say the word "beer" without any attributive, it means "cooked beer"), the difference between them lies in the different packaging methods, and there is no difference in the rest.

Draft beer (draft beer = pure draft beer) is beer that has not been pasteurized. After ordinary filtration (that is, filtering out yeast and large impurities to clarify the beer without sterilization), it is directly filled, usually in insulated plastic barrels or stainless steel barrels. Because there is no disinfection, it can only be stored for a few days. Domestic wineries only produce in the peak season, and all of them are contracted to private owners, with little output. Generally, it is directly supplied to food stalls or small restaurants.

Ordinary cooked beer is a kind of beer that is filtered by ordinary beer, poured into ordinary cleaned glass bottles or glass bottles, and then pasteurized. After pasteurization, microorganisms are killed and can be preserved for a long time, and some flavor substances will be lost, but the main nutrients will not be lost.

Pure draft beer is a kind of beer that is filtered by a common filter, sterilized by aseptic membrane filtration and poured into a completely sterilized glass bottle without pasteurization. Its advantage is that it can not only retain the delicate flavor of beer, but also preserve it for a long time.

Draught beer can make it in a brewery in China, even if the equipment is small and the management is poor; Pure life is not something that any factory can do, and it needs good equipment and management.

Under the condition of the same concentration and raw materials as the original wort, there is no obvious difference in nutritional components among draft beer, cooked beer and pure beer, but there are differences in taste. However, the raw materials used by ordinary manufacturers to produce draft beer are usually better than ordinary cooked beer. Of course, ordinary cooked beer is also divided into different grades, while draught beer is usually brewed with the lowest grade beer. Generally speaking, the private owners who sell draft beer in domestic factories are usually only about 1 yuan per liter, but in the hands of consumers, they often sell it to 7-8 yuan per liter, and the profit rate is quite amazing, so it is possible to have this view.

In addition, if you want to gain weight, it is useless to drink beer alone, but it is useful to eat a lot of high-calorie food at the same time, because beer will promote digestion.

I wonder if you can understand this explanation.