Probiotics are a kind of active microorganisms that are beneficial to the host. They are the general name of active beneficial microorganisms that can produce clear health care function, improve the microecological balance of the host and play a beneficial role. The beneficial bacteria or fungi in human and animals mainly include Clostridium butyricum, Lactobacillus, Bifidobacterium, Actinomyces, Yeast and so on.

Classification of probiotics:

So far, probiotics discovered by scientists can be roughly divided into three categories, including:

(1) Lactobacillus (such as Lactobacillus acidophilus, Lactobacillus casei, Lactobacillus jejuni and Lactobacillus Raman);

(2) Bifidobacterium (such as Bifidobacterium longum, Bifidobacterium brevis, Bifidobacterium ovatum, Bifidobacterium thermophilus, etc.). );

(3) Gram-positive cocci (such as Streptococcus faecalis, Lactococcus, Streptococcus intermedia, etc.). ).

In addition, some yeasts and enzymes can also be classified as probiotics.

Extended data:

Main functions of probiotic Bifidobacterium:

1, is the human intestinal police.

Bifidobacterium living in the intestine grows on the intestinal mucosa, forming a "biofilm barrier", just like building a great steel wall on the surface of human intestine, which plays the role of public security police. The invading pathogenic bacteria lost their foothold in the growth and reproduction of the intestine. Moreover, these beneficial bacteria can stimulate the immune system and lymphoid tissue of the intestine and produce secretory antibody-immunoglobulin A, which activates the nonspecific immune function of T cells and causes the proliferation of neutrophils and macrophages.

Promote NK cells (natural killer cells) and induce the production of interferon, interleukin, tumor necrosis factor and other cytokines. , enhance human immune function, improve anti-infection, anti-cell mutation, anti-tumor, anti-aging ability. At the same time, acidic substances such as lactic acid and acetic acid produced by Bifidobacterium metabolism keep the intestinal environment acidic. Acidic environment is not conducive to the growth of harmful bacteria in the intestine, so positive pressure can maintain human health.

2, it is a scavenger in the human intestine.

Lactic acid and acetic acid secreted by Bifidobacterium stimulate intestinal wall, promote intestinal peristalsis, maintain normal defecation function, and discharge harmful and toxic substances in the intestine in time. At the same time, Bifidobacterium can decompose various harmful substances in the body. Some of these harmful substances can induce cancer, cause cancer or promote aging. In addition, Bifidobacterium can prevent the absorption of excess cholesterol, accelerate the excretion of harmful substances and toxins in the intestine, and play the role of scavenger.

3. Synthesize some nutrients

Probiotics in the intestine can synthesize B vitamins, such as vitamin K, B 1, B2, B 12, folic acid, etc. These are all necessary for the human body, especially vitamin K, which cannot be synthesized by the human body itself and must rely on probiotics in the intestine. Therefore, probiotics are also producers of "biopharmaceuticals" in the human body.

References:

Probiotics-Baidu Encyclopedia

Probiotic Bifidobacterium-Baidu Encyclopedia