Fasting refers to how long you don't eat

Fasting refers to 4 to 5 hours after a meal, which also means that you cannot eat from the time you get up in the morning until the time of examination. This is to empty the food from the stomach to the duodenum. Fasting is required for gastroscopy, blood tests, and other physical examinations. Some surgeries do not require you to eat on an empty stomach, while others require you to eat on an empty stomach and you must follow the doctor's instructions, otherwise it will affect the test results.

How many hours is fasting?

Common understanding ▼

"Emptying" means that all the food in the stomach is discharged into the duodenum, that is, the stomach is empty. Generally, it can be achieved 4-5 hours after a meal. Before lunch and dinner, it is "empty" in the stomach empty state.

Correct explanation▼

"Fasting" refers to the state of the human body from not eating after 20:00 the previous day until before breakfast the next day, a period of more than 10 hours.

Can crabs be eaten on an empty stomach?

It is best not to eat crabs on an empty stomach.

Because crabs are rich in protein, their absorption rate is low when the stomach is empty, so their nutritional value is reduced and eating crabs is in vain. These proteins will be converted into calories and wasted. Not only will it fail to replenish the body, but it will increase the burden on the body. Moreover, crabs are cold in nature, and eating them on an empty stomach can easily irritate the stomach and intestines, causing gastrointestinal discomfort such as diarrhea and abdominal pain.

Do not eat cold drinks on an empty stomach

The temptation of cold drinks to children is really unparalleled! But, do you know? Even in the hot summer, if children eat cold drinks on an empty stomach, it will irritate the gastric mucosa and cause vasoconstriction. Eating on an empty stomach for a long time will cause ischemia of the gastric mucosa and lead to gastritis. Therefore, no matter what season it is, it is best not for children to eat cold drinks on an empty stomach. Similarly, in addition to cold drinks, iced fruits and drinks should not be given to children on an empty stomach. Some elderly people pamper their children and allow them to eat raw and cold food on an empty stomach, which actually harms the children!

Can hawthorn and orange be eaten on an empty stomach?

People with stomach problems (such as gastritis, gastric ulcers) have excessive gastric acid secretion and are not suitable to eat sour fruits such as hawthorn and oranges on an empty stomach. But for most people, there is no problem in eating it in moderation on an empty stomach.

Do not drink alcohol on an empty stomach

Drinking on an empty stomach can easily irritate the gastric mucosa and cause various diseases such as gastritis and gastric ulcers. The human body can easily develop hypoglycemia, which can lead to dizziness, cold sweats, palpitations, and in severe cases, hypoglycemia and coma.