Probiotics are living microorganisms that can maintain the balance of human intestinal flora and have potential health care and promotion effects on human body. Microecological regulators in probiotics can not only prevent diseases, regulate human microecological imbalance, maintain intestinal microecological balance and improve human health, but also use the principle of biological antagonism to achieve the therapeutic purpose of treating bacteria with bacteria.

Old people should pay attention to eating probiotics when they are healthy.

Probiotics, in particular, have rapid onset and long-lasting effects, and have irreplaceable therapeutic and health care functions, greatly changing the methods and standards for human use of antibiotics. With the rise of microecological theory, medicine has moved from the era of bacteriostasis to the era of promoting bacteria. "Treating bacteria with bacteria" means to colonize beneficial bacteria in the intestine, inhibit the reproduction and proliferation of harmful bacteria, and make the human body reach a healthy state. A great deal of research and medical practice have found that microecological preparations made of probiotics such as intestinal bifidobacteria, lactobacillus and streptococcus faecalis can effectively supplement human intestinal bifidobacteria, lactobacillus and streptococcus faecalis, adjust the microecological balance of intestinal tract, play a health care role and make the intestinal tract "younger".

British nutrition experts argue that people over the age of 60 should be encouraged to take probiotics every day to supplement the "beneficial" fungi in the body, so that the beneficial bacteria are always at a high level, thus inhibiting the growth of harmful bacteria and reducing the incidence of intestinal infections. Beneficial bacteria can also promote digestion, reduce toxin production, reduce gastrointestinal dysfunction, help intestinal peristalsis, and effectively improve senile constipation. When supplementing probiotics, the elderly should have good eating habits, eat less foods that are not conducive to the growth of probiotics such as high fat and low fiber, and eat more vegetables and fruits, because they are rich in nutrients that promote the growth of probiotics-prebiotics. Common prebiotics, such as fructooligosaccharides (FOS) and galactooligosaccharides, can regulate intestinal flora, stimulate the proliferation of beneficial bacteria such as Bifidobacterium and promote immunity.

Intestinal aging leads to obstruction of defecation and accumulation of intestinal endotoxin, which can cause many related diseases, such as arteriosclerosis, Alzheimer's disease and malignant tumor. It can be said that "aging begins in the intestine" and "intestinal aging accelerates the whole body aging". In order to maintain human health and maintain young and energetic intestines, the most important thing is to enhance the vitality of beneficial bacteria such as lactic acid bacteria and bifidobacteria. The most direct way is to drink active lactic acid bacteria milk drink every day. Its activity is strong, it can resist the corrosion of various digestive juices, live directly to the small intestine and play a role in the human small intestine.