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Feeling sleepy after eating is a lack of blood supply to the brain

I slept well last night and was full of energy the whole morning, but when I finished lunch, I yawned so much that I couldn’t resist sleepiness…About full hind feel sleepy, the saying that spreads widely is: after eating meal, in order to digest, enter the blood of gastrointestinal tract to be able to increase, the blood quantity that supplies cerebrum to be able to decrease, bring about cerebral ischemia and hypoxia in a short time thereby, cause the condition that reaction is slow, feel sleepy.

Although there is a change in the amount of blood supplied to the brain after a meal, according to relevant research, the change is too small to have a significant impact on the human body.Cerebral blood vessels have their own regulation mechanism, will make the brain blood supply in a relatively stable state, for healthy groups, generally will not say that eating a meal will lead to cerebral ischemia.

So what exactly causes post-meal drowsiness?

When you’re full, you feel sleepy. What’s going on?

Often after meals depressed, it is likely to be the body hormone in the “cause” :Gallbladder contraction hormone

A Study at Stanford University found that the amount of cholecystokinin increases significantly within two hours of a meal, and decreases after two hours. In contrast, the higher the level of cholecystokinin, the more sleepy.In addition, the higher the general fat content, the higher the levels of cholecystins and sleepiness will be.

After the human body eats, the food in the process of digestion and absorption, postprandial blood sugar will rise, and inhibit the secretion of orexin in the body. When orexin levels are low, people tend to feel sleepy and don’t want to move. When orexin levels are high, people tend to be more awake and active.Therefore, especially when eating starchy foods that are easier to digest, blood sugar rises more quickly and you are more likely to feel sleepy.

The glucose in the food after meals is absorbed by the body, and insulin is secreted to help control blood sugar. Insulin stimulates protein synthesis and increases the amount of tryptophan in the body. This leads to the formation of serotonin in the brain, which leads to the formation of melatonin, which makes the body sleepy.In addition, insulin can also promote potassium ions in the body from the blood into the cells, if the body is in a mildly hypokalemic state, the body will also appear fatigue and drowsiness.

How to relieve food fatigue?Control “quantity”.

Eat every meal “seven points full”; It is suggested that coarse cereals, beans and tubers should be used to replace refined white and soft foods, accounting for about 1/3 of the total staple food. Increase the intake of leafy green vegetables and other foods high in dietary fiber, and reduce the intake of foods high in fat and sugar.

After lunch, take a nap of about 15 minutes, which can not only effectively relieve sleepy state, but also reduce the body’s stress hormone secretion, improve afternoon work efficiency.Also, a Greek study found that people who took naps three or more times a week for less than 30 minutes each time had a 37 percent lower risk of heart disease!

A study in Frontiers in Human Neuroscience found that drinking water can boost your brain by 14 percent, help keep your mind sharp and reduce sleepiness.After full meal often feel sleepy, besides be inside body hormone “make trouble”, also may be the body itself appeared problem, it is the sign of disease!

Liver is an important metabolic organ. When diseases occur, its functions such as detoxification, regulation of water and electrolyte balance, etc., will be reduced, and the nutrients transported to other organs of the body will also be reduced. Therefore, it is easy to cause fatigue and feel powerless.Liver appears problem, besides sleepy, still may appear the face is blackened, yellowish brown have no China, coarse, lip color is dark violet wait; Also can cause facial capillaries to dilate, spider naevus and liver palm, some patients can have splenomegaly.Drowsiness is one of the common symptoms of diabetes. Because of the disorder of glucose metabolism in such people, sugar cannot be fully utilized by the body, and is discharged from the urine, easily causing physical decline and mental malaise.

In addition, many diabetic patients will be complicated with hyperviscosity and cerebral vascular lesions, resulting in insufficient cerebral artery blood supply, cerebral ischemia and hypoxia, which will cause drowsiness and dizziness.Just finished eating, I feel hungry. I eat a lot, but I lose weight. Impaired vision; Wounds are difficult to heal; Numbness or pain in the feet; More frequent urination at night.Therefore, if there are related symptoms, it is necessary to do a blood sugar test in time to confirm whether it is caused by diabetes.


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