Whether crops grow well depends on the quality of soil. Intestine is the key to a person's health. If the intestinal function is good, the nutrient absorption will be good, the toxin metabolism will be normal, and the immunity will be maintained at a high level, so the body will not have any problems.
Many people ignore the intestines. In human organs, diligent intestines can't even be the "five internal organs", but can only be committed to the "six internal organs" with low voice. Although the intestine is four to five times the height of the human body, it does not conform to the law of "concentration for essence", so it is easy to be marginalized. Only when something goes wrong will people find that every centimeter of the intestines has valuable value.
If the number of neurons is used to measure intelligence, to the surprise of many people, the intestine will be among the best in this ranking. There are millions of neurons in the intestine, more than in the spinal cord. Moreover, it can operate independently without the control of the central nervous system, that is, as a branch of the central nervous system, the intestinal nervous system is independent and responsible for gastrointestinal activities.
The intestine is called the "second brain", but it can't be separated from the real brain, the supreme commander of the human body. There is a powerful two-way communication system between the brain and the intestine, which is called the intestinal brain axis. The brain and intestines are vital to each other. Studies have found that if there is no intestinal flora, brain development will be abnormal. Dr Katrina Johnson, a researcher at Oxford University in the United Kingdom, said that further research is revealing the relationship between the intestine and the brain, including people's emotional and mental health problems.
There are not only a large number of neurons in the intestine, but also the endless intestine in the human body provides sufficient space for a large number of colonies. Healthy human parasitic colonies are diverse and a world composed of various microorganisms. These huge microbial groups composed of various bacteria not only participate in the digestion and absorption of food, but also participate in the regulation of nerves, circulation, exercise, endocrine and other aspects.
Some studies on animals show that certain types of intestinal microorganisms can affect chemicals in the brain, thus affecting behavior and making animals more active. Intestinal flora plays many roles in human health, but strangely, no two people have exactly the same flora. As soon as humans were born, microorganisms began to multiply in the intestines, and intestinal flora was formed.
Intestines are also the home base of colonies. When there is a problem in the base camp, people will not only have diarrhea or constipation, but also have many more complicated changes. For example, the colony diversity of patients diagnosed with clinical depression is significantly lower than that of healthy people.
Intestine needs to complete many tasks, but its own work is the digestion and absorption of nutrients. Different foods bring different burdens to the intestines. Although intestines are not picky about food, they also have their own preferences.
The American Intestinal Research Project collected and compared the intestinal flora of thousands of people living in the United States. So far, studies have shown that people with high plant food content in their diet have more diverse microbial communities, which is obviously different from people who don't eat plant food. Daniel MacDonald, the scientific director of the project, believes that the microbial community in human body is healthy, but it is still unclear whether the change from a diet with high plant food content to a diet with low healthy food content will fundamentally change the microbial community and how this change occurs.
In general, most foods that are beneficial to human health are also suitable for various microorganisms in the body. However, there are always some foods that are more beneficial. Studies have shown that vegetarian diet will affect the structure and function of intestinal flora, and vegan diet can best keep intestinal flora in a healthy state.
We can say that the composition of intestinal flora is largely influenced by diet, but diet does not play a decisive role, it is more like a way of regulation. When people adapt to vegetarianism within 24 hours, the composition of intestinal flora will change. However, within 48 hours of returning to normal diet, the flora will return to its original state.
Food types will affect the flora in the intestine, and the flora will affect people's body shape. The researchers analyzed the plasma and feces samples of 600 obese and non-obese people, and found that 19 different metabolites were related to four intestinal bacteria that might lead to weight gain.
So far, among the latest research topics on the relationship between body weight and intestinal health, the most controversial and breakthrough achievement is the study on the bacterial species Christenseaceae. 97% of people have detected this kind of bacteria in their intestines, but studies have found that there are more such bacteria in slim people.